aws_route_tables data source filtering

[duboisf]

Change proposed in this pull request:

Add a filter argument to the aws_route_tables data source.

Output from acceptance testing:

$ make testacc TEST=./aws TESTARGS='-run=TestAccDataSourceAwsRouteTables'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./aws -v -run=TestAccDataSourceAwsRouteTables -timeout 120m
=== RUN   TestAccDataSourceAwsRouteTables
--- PASS: TestAccDataSourceAwsRouteTables (36.45s)
PASS
ok      github.com/terraform-providers/terraform-provider-aws/aws       36.467s

[bflad]

Looks great @duboisf -- thanks! 🚀

1 test passed (all tests)
=== RUN   TestAccDataSourceAwsRouteTables
--- PASS: TestAccDataSourceAwsRouteTables (15.36s)

[bflad]

This has been released in version 1.26.0 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!