Removing locks from 3PAR FC and iSCSI drivers

Removed locks from the 3PAR FC and iSCSI drivers.  In high load
environments where many simultaneous volume creations/deletions
and attaches/detaches are happening errors occur periodically.

By changing the drivers to create a new connection to the 3PAR
backend whenever a volume request is made the errors are avoided
and performance is improved.

Closes-Bug: 1381190
Change-Id: Ie588a1d87cf5a22ddf2e890c440582e1fe67f2cb
Merge "Removing locks from 3PAR FC and iSCSI drivers"