Fixed a bug with security groups for later versions of fog.
Fixed a bug with security groups for later versions of fog.

infochimps-away/cluster_chef,infochimps-labs/ironfan,infochimps-labs/ironfan,infochimps-away/cluster_chef,infochimps-away/cluster_chef,infochimps-away/cluster_chef,infochimps-labs/ironfan