devstack: fix aodh-api launch
devstack: fix aodh-api launch

This now uses the pbr wsgi_scripts facility, so the current command line is
invalid. Let's remove -v and -d as debug level is conrtolled by
$ENABLE_DEBUG_LOG_LEVEL. The configfile is hardcoded to the default location in
settings, so there's no neeed to pass it too.

Change-Id: I6d13c17d32017544b8fa8411fdef4af86a7b0a4d
Closes-Bug: #1620880

openstack/aodh,openstack/aodh