This defines a number of variables for Trove configuration files
and options
In addition to general cleanup within devstack, this also enables
consumers to enable features such as Openstack profiling, without
the need to repeat the hardcoding of these parameters in their
local.conf
Change-Id: Ieaa999ea3ca5c4f7d320416a8d2375c9a1d03d39
closes-bug: #1421403