Remove unused volume_adapter conf

The [powervm]volume_adapter conf setting has not been used since
ebee3eae88 was merged during ocata
development. This removes the unused remnants.

Change-Id: I0c5c1afce6528115754adaa93edf21ee2126a621

nova_powervm/conf/powervm.py

@@ -46,11 +46,6 @@ powervm_opts = [
                default='/tmp/cfgdrv/',
                help='The location where the config drive ISO files should be '
                     'built.'),
-    cfg.StrOpt('volume_adapter',
-               choices=['fibre_channel', 'iscsi'], ignore_case=True,
-               default='fibre_channel',
-               help='The volume adapter to use for PowerVM volumes. '
-               'Valid options are: fibre_channel, iscsi'),
     cfg.StrOpt('pvm_vswitch_for_novalink_io',
                default='NovaLinkVEABridge',
                help="Name of the PowerVM virtual switch to be used when "

nova_powervm/tests/virt/powervm/test_driver.py

@@ -216,7 +216,6 @@ class TestPowerVMDriver(test.NoDBTestCase):
 
         mock_initiators.return_value = initiators
 
-        self.flags(volume_adapter='fibre_channel', group='powervm')
         vol_connector = self.drv.get_volume_connector(mock.Mock())
         self.assertIsNotNone(vol_connector['wwpns'])
         self.assertIsNotNone(vol_connector['host'])
@@ -899,7 +898,6 @@ class TestPowerVMDriver(test.NoDBTestCase):
         # Validate the other volume types only return SCSI mappings
         vol_types = ['iscsi', 'gpfs', 'local', 'nfs']
         for vol_type in vol_types:
-            self.flags(volume_adapter='iscsi', group='powervm')
             mock_bdm = {'connection_info':
                         {'driver_volume_type': vol_type}}
             xag = self.drv._get_inst_xag(mock.Mock(), [mock_bdm])