provider/azurerm: add network interface resource

[stack72]

Scaffold the Azure RM Network Interface resource

• Schema
• CRUD
• Acceptance Tests
• Documentation

make testacc TEST=./builtin/providers/azurerm TESTARGS='-run=AzureRMNetworkInterface' 2>~/tf.log
==> Checking that code complies with gofmt requirements...
go generate ./...
TF_ACC=1 go test ./builtin/providers/azurerm -v -run=AzureRMNetworkInterface -timeout 120m
=== RUN   TestAccAzureRMNetworkInterface_basic
--- PASS: TestAccAzureRMNetworkInterface_basic (133.45s)
PASS
ok      github.com/hashicorp/terraform/builtin/providers/azurerm    133.465s

Currently, there is an open issue (Azure/azure-sdk-for-go#259) that stops multiple ip_configuration blocks being used in the resource.

[jen20]

👍 I've tested this locally. Let's pick this up when Azure/azure-sdk-for-go#259 is resolved and make sure we re-enable the broken test - I'll open an issue for that and link it here. Nice work @stack72!

[jen20]

#4600

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

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