Add initial mock cloud provider class

atst/domain/csp/__init__.py

@@ -1,9 +1,11 @@
+from .cloud import MockCloudProvider
 from .files import RackspaceFileProvider
 from .reports import MockReportingProvider
 
 
 class MockCSP:
     def __init__(self, app):
+        self.cloud = MockCloudProvider()
         self.files = RackspaceFileProvider(app)
         self.reports = MockReportingProvider()
 

atst/domain/csp/cloud.py

@@ -0,0 +1,16 @@
+from uuid import uuid4
+
+
+class CloudProviderInterface:
+    def create_application(self, name):  # pragma: no cover
+        """Create an application in the cloud with the provided name. Returns
+        the ID of the created object.
+        """
+        raise NotImplementedError()
+
+
+class MockCloudProvider(CloudProviderInterface):
+    def create_application(self, name):
+        """Returns an id that represents what would be an application in the
+        cloud."""
+        return uuid4().hex