HOTFIX necessary for suover-adding IPs to a suspended instance
Added support to test hypervisor capacity before resume

If hypervisor is over capacity there is a detailed error message that will
propagate out of the API.. Non-500 errors will be sent to the user and should
help users give better error emails to support
Merge branch 'gunnr' of https://github.com/iPlantCollaborativeOpenSource/atmosphere