Skip secgroup invalid name/desc tests until bug 1161411 is fixed

There is an existing review which tries to deal with bug 1161411:

https://review.openstack.org/#/c/34559/

Until there is consensus on how to fix this, skip the compute tests if
neutron is available.

(cherry picked from commit 6e3454465e343922dd4c977c1e4fd84f257f5650)

Conflicts:
	tempest/tests/compute/security_groups/test_security_groups.py

Change-Id: I41bd2232ad4e489daaa8de3902d7e158f3e577bf
Merge "Skip secgroup invalid name/desc tests until bug 1161411 is fixed" into stable/grizzly