Closes-Bug: Calling update in aggregator.py does not return any value. Updated to the correct way of calling it.

Change-Id: Iaa2706dc8df53d32b5bbf9f1dc136b2be459a5d0
Updating agent keystone authentication

Updated the agent to obtain a project scoped token from Keystone.
Fixed an issue with the open_file_descriptors_perc calculation in collector.

Change-Id: Ibfe68f73cd53622c76835939aa93f85cd27a2791
Added --dimensions to monasca-setup

Change-Id: I91686f896b024488322f661049ee2810ac22ce35
Merge commit '2a5b3c1cf16f52bd3653e745a9798bd7ed935b43'

Conflicts:
	monagent/common/aggregator.py