Added a Common KafkaConsumer for all of the plugins

 - Added the common consumer for all request messages
 - Updated the OpenStack plugins to use the common consumer
 - Included the access_credentials topic into this consumer
 - Added the json schemas for the openstack, vrops and cloudwatch
   access credentials
 - Updated the Openstack plugins to use access_credentials messages
 - Added and updated all necessary tests
 - Updated installation documentation

Change-Id: I1486cf7230e351e5dbf18464110e5780d392eeeb
Signed-off-by: Helena McGough <helena.mcgough@intel.com>
diff --git a/test/OpenStack/__init__.py b/test/OpenStack/__init__.py
index d25e458..861627f 100644
--- a/test/OpenStack/__init__.py
+++ b/test/OpenStack/__init__.py
@@ -19,4 +19,13 @@
 # For those usages not covered by the Apache License, Version 2.0 please
 # contact: helena.mcgough@intel.com or adrian.hoban@intel.com
 ##
+"""OpenStack plugin tests."""
 
+import logging
+
+# Initialise a logger for tests
+logging.basicConfig(filename='OpenStack_tests.log',
+                    format='%(asctime)s %(message)s',
+                    datefmt='%m/%d/%Y %I:%M:%S %p', filemode='a',
+                    level=logging.INFO)
+log = logging.getLogger(__name__)