build(api-client): generate go client

    Primary Changes
    ----------------
    1. Updated package.json file for packages to
       include the new codegen script
    2. Added a new dep, replace for string
       manupulation in package.json

Fixes hyperledger-cacti#393

Signed-off-by: jagpreetsinghsasan <jagpreet.singh.sasan@accenture.com>

extensions/cactus-plugin-htlc-coordinator-besu/package.json

@@ -47,6 +47,7 @@
     "codegen:openapi": "run-p generate-sdk",
     "generate-sdk": "run-p 'generate-sdk:*'",
     "generate-sdk:typescript-axios": "openapi-generator-cli generate -i ./src/main/json/openapi.json -g typescript-axios -o ./src/main/typescript/generated/openapi/typescript-axios/ --ignore-file-override ../../openapi-generator-ignore",
+    "generate-sdk:go": "openapi-generator-cli generate -i ./src/main/json/openapi.json -g go -o ./src/main/go/generated/openapi/go-client/ --git-user-id hyperledger --git-repo-id $(echo $npm_package_name | replace @hyperledger/ \"\" -z)/src/main/go/generated/openapi/go-client --package-name $(echo $npm_package_name | replace @hyperledger/ \"\" -z) --ignore-file-override=../../openapi-generator-ignore",
     "watch": "npm-watch",
     "webpack": "npm-run-all webpack:dev webpack:prod",
     "webpack:dev": "npm-run-all webpack:dev:node webpack:dev:web",

extensions/cactus-plugin-htlc-coordinator-besu/src/main/go/generated/openapi/go-client/.openapi-generator/FILES

@@ -0,0 +1,19 @@
+.travis.yml
+README.md
+api/openapi.yaml
+api_default.go
+client.go
+configuration.go
+go.mod
+go.sum
+model_counterparty_htlc_request.go
+model_htlc_package.go
+model_own_htlc_request.go
+model_web3_signing_credential.go
+model_web3_signing_credential_cactus_keychain_ref.go
+model_web3_signing_credential_none.go
+model_web3_signing_credential_private_key_hex.go
+model_web3_signing_credential_type.go
+model_withdraw_counterparty_request.go
+response.go
+utils.go

extensions/cactus-plugin-htlc-coordinator-besu/src/main/go/generated/openapi/go-client/.openapi-generator/VERSION

@@ -0,0 +1 @@
+6.6.0

extensions/cactus-plugin-htlc-coordinator-besu/src/main/go/generated/openapi/go-client/.travis.yml

@@ -0,0 +1,8 @@
+language: go
+
+install:
+  - go get -d -v .
+
+script:
+  - go build -v ./
+

extensions/cactus-plugin-htlc-coordinator-besu/src/main/go/generated/openapi/go-client/README.md

@@ -0,0 +1,122 @@
+# Go API client for cactus-plugin-htlc-coordinator-besu
+
+Can exchange assets between networks
+
+## Overview
+This API client was generated by the [OpenAPI Generator](https://openapi-generator.tech) project.  By using the [OpenAPI-spec](https://www.openapis.org/) from a remote server, you can easily generate an API client.
+
+- API version: 2.0.0-rc.1
+- Package version: 1.0.0
+- Build package: org.openapitools.codegen.languages.GoClientCodegen
+
+## Installation
+
+Install the following dependencies:
+
+```shell
+go get github.com/stretchr/testify/assert
+go get golang.org/x/net/context
+```
+
+Put the package under your project folder and add the following in import:
+
+```golang
+import cactus-plugin-htlc-coordinator-besu "github.com/hyperledger/cactus-plugin-htlc-coordinator-besu/src/main/go/generated/openapi/go-client"
+```
+
+To use a proxy, set the environment variable `HTTP_PROXY`:
+
+```golang
+os.Setenv("HTTP_PROXY", "http://proxy_name:proxy_port")
+```
+
+## Configuration of Server URL
+
+Default configuration comes with `Servers` field that contains server objects as defined in the OpenAPI specification.
+
+### Select Server Configuration
+
+For using other server than the one defined on index 0 set context value `sw.ContextServerIndex` of type `int`.
+
+```golang
+ctx := context.WithValue(context.Background(), cactus-plugin-htlc-coordinator-besu.ContextServerIndex, 1)
+```
+
+### Templated Server URL
+
+Templated server URL is formatted using default variables from configuration or from context value `sw.ContextServerVariables` of type `map[string]string`.
+
+```golang
+ctx := context.WithValue(context.Background(), cactus-plugin-htlc-coordinator-besu.ContextServerVariables, map[string]string{
+	"basePath": "v2",
+})
+```
+
+Note, enum values are always validated and all unused variables are silently ignored.
+
+### URLs Configuration per Operation
+
+Each operation can use different server URL defined using `OperationServers` map in the `Configuration`.
+An operation is uniquely identified by `"{classname}Service.{nickname}"` string.
+Similar rules for overriding default operation server index and variables applies by using `sw.ContextOperationServerIndices` and `sw.ContextOperationServerVariables` context maps.
+
+```golang
+ctx := context.WithValue(context.Background(), cactus-plugin-htlc-coordinator-besu.ContextOperationServerIndices, map[string]int{
+	"{classname}Service.{nickname}": 2,
+})
+ctx = context.WithValue(context.Background(), cactus-plugin-htlc-coordinator-besu.ContextOperationServerVariables, map[string]map[string]string{
+	"{classname}Service.{nickname}": {
+		"port": "8443",
+	},
+})
+```
+
+## Documentation for API Endpoints
+
+All URIs are relative to *https://www.cactus.stream*
+
+Class | Method | HTTP request | Description
+------------ | ------------- | ------------- | -------------
+*DefaultApi* | [**CounterpartyHtlcV1**](docs/DefaultApi.md#counterpartyhtlcv1) | **Post** /api/v1/plugins/@hyperledger/cactus-plugin-htlc-coordinator-besu/counterparty-htlc | Create an instance to interact with the counterparty HTLC
+*DefaultApi* | [**OwnHtlcV1**](docs/DefaultApi.md#ownhtlcv1) | **Post** /api/v1/plugins/@hyperledger/cactus-plugin-htlc-coordinator-besu/own-htlc | Create an instance to interact with the own HTLC.
+*DefaultApi* | [**WithdrawCounterpartyV1**](docs/DefaultApi.md#withdrawcounterpartyv1) | **Post** /api/v1/plugins/@hyperledger/cactus-plugin-htlc-coordinator-besu/withdraw-counterparty | Withdraw funds of the counterparty HTLC
+
+
+## Documentation For Models
+
+ - [CounterpartyHTLCRequest](docs/CounterpartyHTLCRequest.md)
+ - [HtlcPackage](docs/HtlcPackage.md)
+ - [OwnHTLCRequest](docs/OwnHTLCRequest.md)
+ - [Web3SigningCredential](docs/Web3SigningCredential.md)
+ - [Web3SigningCredentialCactusKeychainRef](docs/Web3SigningCredentialCactusKeychainRef.md)
+ - [Web3SigningCredentialNone](docs/Web3SigningCredentialNone.md)
+ - [Web3SigningCredentialPrivateKeyHex](docs/Web3SigningCredentialPrivateKeyHex.md)
+ - [Web3SigningCredentialType](docs/Web3SigningCredentialType.md)
+ - [WithdrawCounterpartyRequest](docs/WithdrawCounterpartyRequest.md)
+
+
+## Documentation For Authorization
+
+Endpoints do not require authorization.
+
+
+## Documentation for Utility Methods
+
+Due to the fact that model structure members are all pointers, this package contains
+a number of utility functions to easily obtain pointers to values of basic types.
+Each of these functions takes a value of the given basic type and returns a pointer to it:
+
+* `PtrBool`
+* `PtrInt`
+* `PtrInt32`
+* `PtrInt64`
+* `PtrFloat`
+* `PtrFloat32`
+* `PtrFloat64`
+* `PtrString`
+* `PtrTime`
+
+## Author
+
+
+