OS-97

Security groups can now be specified via "nova launch" or the API

Change-Id: I95b09104b6dd0e41460c89e16695c17ed637f168
Merge branch 'stable/essex' into stable/folsom

Conflicts:
	nova/gridcentric/nova/api.py
	nova/gridcentric/tests/test_api.py
	nova/gridcentric/tests/utils.py

Change-Id: I1df05da178181dbcc857a0e6d10f7dd555b3a23b