r/aws_codepipeline: Add arn attribute

[bflad]

Reference: http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html#arn-syntax-codepipeline
Closes #2714

make testacc TEST=./aws TESTARGS='-run=TestAccAWSCodePipeline_basic'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./aws -v -run=TestAccAWSCodePipeline_basic -timeout 120m
=== RUN   TestAccAWSCodePipeline_basic
--- PASS: TestAccAWSCodePipeline_basic (49.59s)
PASS
ok  	github.com/terraform-providers/terraform-provider-aws/aws	49.626s

[jen20]

Thanks @bflad!

[bflad]

This has been released in terraform-provider-aws version 1.7.0. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

[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.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!