Add Quantum support for Grizzly release to openstack-status

Code was previously present to check quantum status but it
was not compatible with Grizzly.  This patch drops the feature
of a less verbose output of Quantum because /etc/quantum is typically
700 root root requiring the script to run under sudo.

Signed-off-by: Steven Dake <sdake@redhat.com>
Merge pull request #5 from sdake/master

openstack-status: add Quantum support for Grizzly release