User internalURL for interaction with volume api

Currently nova compute uses publicURLs for communication with
cinder api. This prevents from removing public ips from compute nodes

- Add additional params to nova_config,
  cinder_catalog_option=volume.cinder.internalURL

Change-Id: I122d04221eedaa9667f396b2494573804a8abd66
Closes-Bug: 1357292
Merge "User internalURL for interaction with volume api"