Changes way metrics are collected, removing the use of mon-proxy

Collector now collects vim metrics directly, without to send kafka msgs
to mon-proxy. Also a plugin/backend model has been implemented to ease
possible inclusions of other vims and tsbds in the future.

Signed-off-by: Benjamin Diaz <bdiaz@whitestack.com>
Change-Id: I554a4f5e410a31ec70aa301c8aa819b1f03a3857
diff --git a/osm_mon/common/__init__.py b/osm_mon/common/__init__.py
index e69de29..971f4e9 100644
--- a/osm_mon/common/__init__.py
+++ b/osm_mon/common/__init__.py
@@ -0,0 +1,21 @@
+# Copyright 2018 Whitestack, LLC
+# *************************************************************
+
+# This file is part of OSM Monitoring module
+# All Rights Reserved to Whitestack, LLC
+
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+
+#         http://www.apache.org/licenses/LICENSE-2.0
+
+# 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.
+
+# For those usages not covered by the Apache License, Version 2.0 please
+# contact: bdiaz@whitestack.com or glavado@whitestack.com
+##