Use flake8 and hacking.

Fixes bug 1172444

Change-Id: I46b733bd16fa49c58c642348988233064d2b673b
Storwize/SVC: fix attach bug for live migration.

Add force flag for mkvdiskhostmap command to allow multi host mapping

Change-Id: I290a5986b213a0aaeae0d0ea0ad57350c9dee3c9
Fixes: bug #1179773
Merge "Use flake8 and hacking."
Merge "Storwize/SVC: fix attach bug for live migration."