Changes required:
* ECR Read func doesn't need to take ``registry_id` as it uses the
current account Id
* `name` wasn't being set in the ECR Read so the import was failing as
name wasn't found
```
make testacc TEST=./builtin/providers/aws
TESTARGS='-run=TestAccAWSEcrRepository_'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /vendor/)
TF_ACC=1 go test ./builtin/providers/aws -v
-run=TestAccAWSEcrRepository_ -timeout 120m
=== RUN TestAccAWSEcrRepository_importBasic
--- PASS: TestAccAWSEcrRepository_importBasic (17.37s)
=== RUN TestAccAWSEcrRepository_basic
--- PASS: TestAccAWSEcrRepository_basic (16.05s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 33.437s
```
stack72