Remove unused fake test code

This just confuses everyone.

bug: #1195452
Change-Id: I9d8524a7619663e5f0e5cce619a0587290ff1db7
Provide access to Trove client

python-troveclient is required for implementing Database As A
Service (DBaaS) resource. This patch makes Heat depend on
python-troveclient and also changing clients.py and resource.py
to provide access to troveclient.

Implements: blueprint dbaas-trove-resource

Change-Id: I010d4a11793cc634aa0af5f01b637fff4effbf61
Merge "Remove unused fake test code"
Merge "Provide access to Trove client"