refactor(api-server): instantiate plugins in api-server without insta…

…ll them

Added parameter action to PluginImport to determine if the plugin
should be installed.

Enabled feature to instantiate plugins from cactus-cmd-api-server
without install it.

Enabled feature to install packages from github

Added method create in class ConfigService to override old configuration.
Method newExampleConfigConvict accepts a boolean parameter to force
configuration override.

Closes hyperledger-cacti#1210

Signed-off-by: Elena Izaguirre <e.izaguirre.equiza@accenture.com>

extensions/cactus-plugin-htlc-coordinator-besu/src/test/typescript/integration/plugin-htlc-coordinator/refund.test.ts

@@ -44,6 +44,7 @@ import HashTimeLockJSON from "@hyperledger/cactus-plugin-htlc-eth-besu-erc20/src
 import TestTokenJSON from "@hyperledger/cactus-test-plugin-htlc-eth-besu-erc20/src/test/solidity/token-erc20-contract/Test_Token.json";
 import DemoHelperJSON from "@hyperledger/cactus-test-plugin-htlc-eth-besu-erc20/src/test/solidity/token-erc20-contract/DemoHelpers.json";
 
+//just a single change to trigger github
 const logLevel: LogLevelDesc = "INFO";
 const estimatedGas = 6721975;
 const expiration = 2147483648;