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/setup.py b/setup.py
index 1015de4..3646610 100644
--- a/setup.py
+++ b/setup.py
@@ -68,13 +68,15 @@
         "bottle==0.12.*",
         "peewee==3.1.*",
         "pyyaml==3.*",
+        "prometheus_client==0.4.*",
+        "gnocchiclient==7.0.*",
         "osm-common",
         "n2vc"
     ],
     include_package_data=True,
     entry_points={
         "console_scripts": [
-            "osm-mon-prometheus-exporter = osm_mon.cmd.mon_prometheus_exporter:main",
+            "osm-mon-collector = osm_mon.cmd.mon_collector:main",
         ]
     },
     dependency_links=[