Fixes an uncaught panic during an interface cast in the `template_cloudinit_config` data source.
Fixes: #13572
```
$ make test TEST=./builtin/providers/template TESTARGS="-v -run=TestRender_handlePanic"
==> Checking that code complies with gofmt requirements...
==> Checking AWS provider for unchecked errors...
==> NOTE: at this time we only look for uncheck errors in the AWS package
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/04/12 10:46:33 Generated command/internal_plugin_list.go
go test -i ./builtin/providers/template || exit 1
echo ./builtin/providers/template | \
xargs -t -n4 go test -v -run=TestRender_handlePanic -timeout=60s -parallel=4
go test -v -run=TestRender_handlePanic -timeout=60s -parallel=4 ./builtin/providers/template
=== RUN TestRender_handlePanic
--- PASS: TestRender_handlePanic (0.00s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/template 0.028s
```
Adds import capability to the `aws_codecommit_repository` resource.
Also fixes an issue in the Read function where both `description` and `resource_name` attributes weren't being updated and set in the Schema.
Fixes: #13559
```
$ make testacc TEST=./builtin/providers/aws TESTARGS="-run=TestAccAWSCodeCommitRepository"
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/04/12 10:14:44 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws -v -run=TestAccAWSCodeCommitRepository -timeout 120m
=== RUN TestAccAWSCodeCommitRepository_importBasic
--- PASS: TestAccAWSCodeCommitRepository_importBasic (16.11s)
=== RUN TestAccAWSCodeCommitRepository_basic
--- PASS: TestAccAWSCodeCommitRepository_basic (14.97s)
=== RUN TestAccAWSCodeCommitRepository_withChanges
--- PASS: TestAccAWSCodeCommitRepository_withChanges (26.71s)
=== RUN TestAccAWSCodeCommitRepository_create_default_branch
--- PASS: TestAccAWSCodeCommitRepository_create_default_branch (14.34s)
=== RUN TestAccAWSCodeCommitRepository_create_and_update_default_branch
--- PASS: TestAccAWSCodeCommitRepository_create_and_update_default_branch (27.90s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 100.071s
```
When creating an `aws_route_table`, if a `route` configuration block is left `nil`, Terraform would previously panic. This allows Terraform to catch a faulty interface conversion during the resource create. The resource will still fail to apply, however, since every item in the `route` element is `Optional` we cannot currently catch this error during plan time, via validation.
Fixes: #13545
Jake Champlin