Updated to bring up interfaces that do not have an IP
Merge pull request #235 from rperryman/release/mesa-1.6.1/master

Updated to bring up interfaces that do not have an IP
Fixing issue where default route vanishes from controller on reboot.
Merge pull request #238 from cdearborn/pull-req-release-mesa-1.6.1-master-4fe86b824aeb5e16a70515ec9ef4ea656d9ae912

Fix for CES-1074: Default Gateway is not defined on the Nova-Controller [1/1]