XIV volume manage/unmanage support

XIV support for managing and unmanaging volumes.

Partially Implements: blueprint add-export-import-volumes

Change-Id: I305d2652709181bacd9f5b21f0201858f91f7a15
Enable lazy translation for Cinder

This patch is the final step for getting lazy translation
re-enabled for Cinder.  It removes the use of gettextutils.install()
which is no longer needed with the addition of the explicit import
of _() in all of Cinder's files.  The configuration of 'cinder' catalog
is handled by gettextutils.

The install() function is replaced by gettextutils.enable_lazy() which
properly enables lazy translation when _() or _LX() is used.

Change-Id: I79e705f3852e8aa34034015199d56a8b23aeb8ef
Implements-Blueprint: i18n-enablement
Merge "XIV volume manage/unmanage support"