add centos-6.5 support
Adding cleanup script for performing cleanups after smoketests.
Merge pull request #339 from MirantisDellCrowbar/feature/DCB-250/release/hydrogen/master

Nova smoketests cleanup script.
Merge pull request #307 from MirantisDellCrowbar/feature/DCB-218/hydrogen/master

Feature: Add support CentOS 6.5 [8/13]