Added create_identity_pool and cleaned up test data.

moto/cognitoidentity/urls.py

@@ -1,10 +1,10 @@
 from __future__ import unicode_literals
-from .responses import DataPipelineResponse
+from .responses import CognitoIdentityResponse
 
 url_bases = [
-    "https?://datapipeline.(.+).amazonaws.com",
+    "https?://cognito-identity.(.+).amazonaws.com",
 ]
 
 url_paths = {
-    '{0}/$': DataPipelineResponse.dispatch,
+    '{0}/$': CognitoIdentityResponse.dispatch,
 }