Common - Type Checkers:

- Added gNMI OpenConfig Driver

src/common/type_checkers/Assertions.py

@@ -34,6 +34,7 @@ def validate_device_driver_enum(message):
         'DEVICEDRIVER_ONF_TR_352',
         'DEVICEDRIVER_XR',
         'DEVICEDRIVER_IETF_L2VPN',
+        'DEVICEDRIVER_GNMI_OPENCONFIG',
     ]
 
 def validate_device_operational_status_enum(message):