Merged 430282-fix-security-group [r=therve] [f=430282]
Ostensibly, this branch was targeted at updating the SecurityGroup model for
use in unit tests (i.e., being able to create a model object with just a name
and description). In the process of using this code against live Amazon
instances, a bug was discovered whose ultimate source was an incorrect tag in
the testing payload data. With this fixed, the security group code performs as
expected, returning the proper results.