resource/aws_api_gateway_client_certificate: Export date fields correctly

[radeksimko]

This was uncovered in our recent test run with TF_SCHEMA_PANIC_ON_ERROR=1:

=== RUN   TestAccAWSAPIGatewayClientCertificate_basic

------- Stderr: -------
panic: created_date: '' expected type 'string', got unconvertible type '*time.Time'

goroutine 113 [running]:
github.com/terraform-providers/terraform-provider-aws/vendor/github.com/hashicorp/terraform/helper/schema.(*ResourceData).Set(0xc4202a8070, 0x2f8ec87, 0xc, 0x2f4dd40, 0xc420544960, 0x0, 0x0)
    /opt/teamcity-agent/work/6025502d125bbe5e/src/github.com/terraform-providers/terraform-provider-aws/vendor/github.com/hashicorp/terraform/helper/schema/resource_data.go:191 +0x237
github.com/terraform-providers/terraform-provider-aws/aws.resourceAwsApiGatewayClientCertificateRead(0xc4202a8070, 0x2b5b4c0, 0xc420286500, 0x0, 0x0)
    /opt/teamcity-agent/work/6025502d125bbe5e/src/github.com/terraform-providers/terraform-provider-aws/aws/resource_aws_api_gateway_client_certificate.go:80 +0x3a5
...
=== RUN   TestAccAWSAPIGatewayClientCertificate_importBasic

------- Stderr: -------
panic: created_date: '' expected type 'string', got unconvertible type '*time.Time'

goroutine 152 [running]:
github.com/terraform-providers/terraform-provider-aws/vendor/github.com/hashicorp/terraform/helper/schema.(*ResourceData).Set(0xc42010f490, 0x2f8ec87, 0xc, 0x2f4dd40, 0xc420596200, 0x0, 0x0)
    /opt/teamcity-agent/work/6025502d125bbe5e/src/github.com/terraform-providers/terraform-provider-aws/vendor/github.com/hashicorp/terraform/helper/schema/resource_data.go:191 +0x237
github.com/terraform-providers/terraform-provider-aws/aws.resourceAwsApiGatewayClientCertificateRead(0xc42010f490, 0x2b5b4c0, 0xc420279900, 0x0, 0x0)
    /opt/teamcity-agent/work/6025502d125bbe5e/src/github.com/terraform-providers/terraform-provider-aws/aws/resource_aws_api_gateway_client_certificate.go:80 +0x3a5

Test results

TF_ACC=1 go test ./aws -v -run=TestAccAWSAPIGatewayClientCertificate_ -timeout 120m
=== RUN   TestAccAWSAPIGatewayClientCertificate_basic
--- PASS: TestAccAWSAPIGatewayClientCertificate_basic (49.03s)
=== RUN   TestAccAWSAPIGatewayClientCertificate_importBasic
--- PASS: TestAccAWSAPIGatewayClientCertificate_importBasic (32.10s)
PASS
ok  	github.com/terraform-providers/terraform-provider-aws/aws	81.182s

[bflad]

LGTM!

2 tests passed (all tests)
=== RUN   TestAccAWSAPIGatewayClientCertificate_importBasic
--- PASS: TestAccAWSAPIGatewayClientCertificate_importBasic (9.11s)
=== RUN   TestAccAWSAPIGatewayClientCertificate_basic
--- PASS: TestAccAWSAPIGatewayClientCertificate_basic (11.84s)

[bflad]

This has been released in version 1.12.0 of the AWS provider. 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!