Init commit for standalone enodebd

Change-Id: I88eeef5135dd7ba8551ddd9fb6a0695f5325337b
diff --git a/common/redis/mocks/mock_redis.py b/common/redis/mocks/mock_redis.py
new file mode 100644
index 0000000..0978932
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+++ b/common/redis/mocks/mock_redis.py
@@ -0,0 +1,33 @@
+"""
+Copyright 2020 The Magma Authors.
+
+This source code is licensed under the BSD-style license found in the
+LICENSE file in the root directory of this source tree.
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+"""
+from redis.exceptions import RedisError
+
+# For non-failure cases, just use the fakeredis module
+
+
+class MockUnavailableRedis(object):
+    """
+    MockUnavailableRedis implements a mock Redis Server that always raises
+    a connection exception
+    """
+
+    def __init__(self, host, port):
+        self.host = host
+        self.port = port
+
+    def lock(self, key):
+        raise RedisError("mock redis error")
+
+    def keys(self, pattern=".*"):
+        """ Mock keys with regex pattern matching."""
+        raise RedisError("mock redis error")