Fix config path for running wsgi in developer mode
Fix config path for running wsgi in developer mode

When following the new developer instructions for running keystone
under uwsgi, keystone could not find the keystone config file under
./etc/. This then caused it to be unable to find the paste config file
that it would have looked for in the same directory, resulting in an
error[1]. This patch adds the same logic that the eventlet server used
to have to add ./etc/keystone.conf to the list of potential config file
locations.

[1] http://paste.openstack.org/show/497439/

Change-Id: Iae02715df3ec28bf537cb8014f829ad52cc54c68

rajalokan/keystone,openstack/keystone,openstack/keystone,ilay09/keystone,mahak/keystone,openstack/keystone,ilay09/keystone,rajalokan/keystone,rajalokan/keystone,ilay09/keystone,cernops/keystone,mahak/keystone,mahak/keystone,cernops/keystone