[openstack_cpi] Trap overlimit exception when querying resource state
[openstack_cpi] Better error message when there is an API overLimit
[openstack_cpi] Skip process when a volume is not attached to a server
[openstack_cpi] Skip process when volume is already attached to server
[openstack_cpi] Fix has_vm? method
Merge pull request #183 from cloudfoundry/openstack_fixes

Openstack fixes