[CORD-3191] Remove old pmc-olt ref. Replace with voltha

Change-Id: I661c00526f377e99aac25037276019e1f724c36e
diff --git a/src/test/utils/VolthaCtrl.py b/src/test/utils/VolthaCtrl.py
index 5d9993a..0a73551 100644
--- a/src/test/utils/VolthaCtrl.py
+++ b/src/test/utils/VolthaCtrl.py
@@ -279,7 +279,7 @@
                                               names = onu_names,
                                               macs = onu_macs)
             device_config['devices'][device_id] = {}
-            device_config['devices'][device_id]['basic'] = dict(driver='pmc-olt')
+            device_config['devices'][device_id]['basic'] = dict(driver='voltha')
             device_config['devices'][device_id]['accessDevice'] = dict(uplink=nni_ports[0]['port'],
                                                                        vlan = uplink_vlan,
                                                                        defaultVlan=str(onu_ports[0])
@@ -424,7 +424,7 @@
                  uplink_vlan_start = VolthaCtrl.UPLINK_VLAN_START,
                  config_fake = False, olt_app = None, teardown = True):
     devices = OnosCtrl.get_devices()
-    olt_devices = filter(lambda d: not d['mfr'].startswith('Nicira') and d['driver'] == 'pmc-olt', devices)
+    olt_devices = filter(lambda d: not d['mfr'].startswith('Nicira') and d['driver'] == 'voltha', devices)
     voltha = VolthaCtrl(host, rest_port = rest_port,
                         uplink_vlan_map = uplink_vlan_map,
                         uplink_vlan_start = uplink_vlan_start)