Incorrect conditional / assignment in SolidFireDriver

References below are in https://git.openstack.org/cgit/openstack/cinder/tree/cinder/volume/drivers/solidfire.py#n351

In _init_volume_mappings (line 341):
            if v.get('provider_id', 'nil') != sfvol['volumeID']: <-- This value does not match the value that provider_id gets updated to 4 lines down
                    v['provider_id'] == sfvol['volumeID']
                    updates.append(
                        {'id': v['id'],
                         'provider_id': self._create_provider_id_string( <-- Above, it should check if provider_id matches this value
                             sfvol['volumeID'], sfvol['accountID'])})

This should be like it is in _init_snapshot_mappings (line 323):

                id_string = self._create_provider_id_string( <-- First save the provider string to a variable
                    sfsnap['snapshotID'],
                    sfsnap['volumeID'])
                if s.get('provider_id') != id_string: <-- check the value here
                    updates.append(
                        {'id': s['id'],
                         'provider_id': id_string}) <-- and assign the same value here if they don't match above