[r=wallyworld],[bug=1188815] Support string id for SecurityGroup et al
Openstack with Quantum/Grizzly uses string ids for SecurityGroup
and other similar data structures. Goose was written for deployments
that use int ids. This branch fixes that issue using the pattern
already in palce to deal with HP Cloud vs Canonistack for
ServerDetail et al ids.
https://codereview.appspot.com/10527043/