Add test for mistyped id

[mbfrahry]

This PR fixes #267. If a user passes in a mistyped ID, Terraform will error.

make testacc TEST=./azurerm TESTARGS="-run=TestAccAzureRMPublicIpStatic_importIdError"
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./azurerm -v -run=TestAccAzureRMPublicIpStatic_importIdError -timeout 120m
=== RUN   TestAccAzureRMPublicIpStatic_importIdError
--- PASS: TestAccAzureRMPublicIpStatic_importIdError (67.52s)
PASS
ok  	github.com/terraform-providers/terraform-provider-azurerm/azurerm	67.554s

[mbfrahry]

This PR fixes #267

[tombuildsstuff]

LGTM - presuming the existing PublicIP tests pass :)

[mbfrahry]

Tests are passing!

[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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