mockpatch: deprecate in favor of native fixtures

Change-Id: I3efb3c64ebce396e756a47d110a74fe8604b6b72

oslotest/mockpatch.py

@@ -15,10 +15,16 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from debtcollector import removals
 import fixtures
 from six.moves import mock
 
 
+removals.removed_module("oslotest.mockpatch", replacement="fixtures",
+                        version="1.13", removal_version="2.0",
+                        message="Use fixtures.Mock* classes instead")
+
+
 class _Base(fixtures.Fixture):
     def setUp(self):
         super(_Base, self).setUp()

requirements.txt

@@ -11,3 +11,4 @@ testtools>=1.4.0
 mock>=1.2
 mox3>=0.7.0
 os-client-config!=1.6.2,>=1.4.0
+debtcollector>=0.3.0 # Apache-2.0