This reverts commit 1668fef9cabea6a23023aab6b97617b4368b14d6
This is a backwards incompatible change, as we see with the
nova driver code that is expecting a VMwareDriverException
but is now getting back a VimFaultException because the unit
tests in nova were passing an unknown fault class name.
Change-Id: I0f8042c6e47f6eb9802e770ffb7d09bdbe57013b
Closes-Bug: #1459021