Some folks are seeing race conditions on overloaded
or slow machines, where the time between issuing the
remove volume command, and the volume being from
/dev/disk/by-path by the kernel isn't long enough.
This patch adds the Cinder retry decorator mechanism.
This patch uses the new retry decorator to try 3 times
to wait for the volume to disappear from the system,
before moving on.
Change-Id: I24cc18d188b8eeb3b7a1392b2bd8b520dc2a0e03
Closes-Bug: 1437441
f4ecdf0f60