Trove conf variables should be defined

[Peter Stachowski]

To facilitate enabling certain features in Trove (such as the OpenStack profiler), some variables should be exposed so they can be referenced in the local.conf file. At present, all the config files in bin/trove have hard-coded names. For example: $TROVE_CONF_DIR/trove.conf

New variables should be made to incorporate the actual configuration file. For example: TROVE_CONF=$TROVE_CONF_DIR/trove.conf

This way, the configuration file can be referenced externally (as $TROVE_CONF, etc.), thus avoiding additional hard-coded information.

For example:
[[post-config|$TROVE_CONF]]
[profiler]
enabled = True

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/155486

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/155486
Committed: https://git.openstack.org/cgit/openstack-dev/devstack/commit/?id=236fd078c085446f7239feba61a1f52c81be5c57
Submitter: Jenkins
Branch: master

commit 236fd078c085446f7239feba61a1f52c81be5c57
Author: Brian Hunter <email address hidden>
Date: Thu Feb 12 16:14:02 2015 -0500

    define variables for Trove to be used in local.conf

    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