Use self.configuration to support the multi-backend case

Use self.configuration instead of using FLAGS directly to make
the driver work in a multi backend environment.
And remove three repeated lines:en = out.split('\r\n')

Fixes bug: 1154125

Change-Id: I6e08706104eabb71677ec8583b9abb9711553504
Fix typo in persona valid values

The 3PAR drivers have a persona extra spec that has a valid
values with a typo in it. The value '11 - VMWare' should be
"11 - VMware', note the lower case 'w'.

Fixes bug 1155781

Change-Id: I70ab255e1ec6a4b83437b072a7eb4fe11eafc710
Merge "Use self.configuration to support the multi-backend case"