Moving mgmt host tests.

* Move mgmt tests to trove
* Deleting rackspace specific tests
* fixing internal references to test_config
* refactored out global variables to use trove.test.config
* refactored int_tests.py to allow extending or removing tests
* refactored colorizer to cut down on logic in int_tests.py

Implements: Blueprint host-mgmt-tests

Change-Id: Iddb44083d2eeb27b066880609f13d7ded4af8372
Merge "Moving mgmt host tests."