Deprecate / obsolete NetApp volume extra specs

The NetApp Data ONTAP (Cluster-mode) NFS & iSCSI drivers for Juno support
the Cinder pools feature, but the drivers are reporting two qualified
extra specs that must be converted to unqualified extra specs in order to
be used by the Cinder scheduler's capability filter. Furthermore, there
are four extra specs that must be deprecated due to having the pools
feature.  Warnings will be logged during volume creation if any of the
obsolete or deprecated extra specs are seen in the volume type.

Change-Id: I4dbd667610e481356304a12b8dae84cff61aa9d9
Closes-bug: 1374630
Merge "Deprecate / obsolete NetApp volume extra specs"