Decentralize cloudformation naming responsibilities (#3201)

* #3127 - Decentralize CF naming responsibilities

* Decentralize CloudFormation naming responsibilities

* Update URLs in cloudformation_resource_type functions

* Fix flake8 errors

* Black formatting

* Add a bunch of imports to populate CloudFormationModel.__subclasses__

* Add noqa to s3 models import statement in cloudformation/parsing.py

* Black formatting

* Remove debugging print statement

Co-authored-by: Bert Blommers <info@bertblommers.nl>

moto/ecr/models.py

@@ -7,7 +7,7 @@ from random import random
 
 from botocore.exceptions import ParamValidationError
 
-from moto.core import BaseBackend, BaseModel
+from moto.core import BaseBackend, BaseModel, CloudFormationModel
 from moto.ec2 import ec2_backends
 from moto.ecr.exceptions import ImageNotFoundException, RepositoryNotFoundException
 
@@ -38,7 +38,7 @@ class BaseObject(BaseModel):
         return self.gen_response_object()
 
 
-class Repository(BaseObject):
+class Repository(BaseObject, CloudFormationModel):
     def __init__(self, repository_name):
         self.registry_id = DEFAULT_REGISTRY_ID
         self.arn = "arn:aws:ecr:us-east-1:{0}:repository/{1}".format(
@@ -67,6 +67,15 @@ class Repository(BaseObject):
         del response_object["arn"], response_object["name"], response_object["images"]
         return response_object
 
+    @staticmethod
+    def cloudformation_name_type():
+        return "RepositoryName"
+
+    @staticmethod
+    def cloudformation_type():
+        # https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ecr-repository.html
+        return "AWS::ECR::Repository"
+
     @classmethod
     def create_from_cloudformation_json(
         cls, resource_name, cloudformation_json, region_name