Skip tests if cinder is not installed

Skipp test_restry_disabled and test_retry_attempt_one
if cinder is not installed.

Change-Id: Iccc36e2ce0f57b5fa67566e1da543f9888bf0f57
Signed-off-by: Chuck Short <chuck.short@canonical.com>
Update Storwize/SVC driver for Grizzly.

Includes FC support, create_cloned_volume, volume type support,
get_volume_stats, and minor bug fixes.

Change-Id: I13e3d7921c5127e6b4e0cbb4e91761e0249ec295
XenAPINFS: fix capacity reporting

Fixes bug 1129056

XenAPINFS did not implement the get_volume_stats method, thus
CapacityFilter fitered out the host, thus no volume was scheduled. This
fix is working around this problem quickly, by reporting an 'unknown'
capacity.

Change-Id: I1dc5327e420a3316201318d52f602ced071d459b
Merge "XenAPINFS: fix capacity reporting"
Merge "Skip tests if cinder is not installed"
Merge "Update Storwize/SVC driver for Grizzly."