Rename default config file to searchlight.conf

[Steve McLellan]

The default config file for searchlight is searchlight-api.conf despite the fact it's used by the listener as well. It makes more sense to me to rename the default to searchlight.conf (it'd still be possible to specify the old name with --config-file).

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/245622

[Travis Tripp (travis-tripp)]

We decided that if we are going to do this, that we need to do it sooner than later.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/245622
Committed: https://git.openstack.org/cgit/openstack/searchlight/commit/?id=13bf6963d72fa4b97584d09b0a48acda8daa4f1a
Submitter: Jenkins
Branch: master

commit 13bf6963d72fa4b97584d09b0a48acda8daa4f1a
Author: liyingjun <email address hidden>
Date: Mon Nov 16 11:13:53 2015 +0800

    Rename default config

    The default config file for searchlight is searchlight-api.conf despite
    the fact it's used by the listener as well. It makes more sense to
    rename the default to searchlight.conf.

    Change-Id: I91744f02a27faa00f5ce082557cf78bf911fb085
    Closes-bug: #1515015