Add 'driver' to podmanager DB

With multi-podmanager support, new attribute 'driver' is added to specify
driver while creating pod manager. It is not a required attribute,
if not specified default podmanager driver redfishv1 will be used. Currently,
it loads PodManagerBase using redfish v1.

Partially-Implements blueprint add-vendor-extensible-framework

Change-Id: I26d60562efa776ef96597b095d45b1506714e96e

valence/controller/podmanagers.py

@@ -39,6 +39,11 @@ def _check_creation(values):
     if values['name'] in names or values['url'] in urls:
         raise exception.BadRequest('duplicated name or url !')
 
+    # If podmanager 'driver' is None, update as "redfishv1" which is default
+    # driver used to manage resources.
+    # 'driver' can take values like "redfishv1", "redfishv2" etc.
+    values['driver'] = values.get('driver', 'redfishv1')
+
     # input status
     values['status'] = get_podm_status(values['url'], values['authentication'])
 

valence/db/models.py

@@ -135,6 +135,9 @@ class PodManager(ModelBaseWithTimeStamp):
         'url': {
             'validate': types.Text.validate
         },
+        'driver': {
+            'validate': types.Text.validate
+        },
         'authentication': {
             'validate': types.List(types.Dict).validate
         },

valence/tests/unit/controller/test_podmanagers.py

@@ -47,6 +47,7 @@ class TestPodManagers(unittest.TestCase):
 
         result_values = copy.deepcopy(values)
         result_values['status'] = constants.PODM_STATUS_ONLINE
+        result_values['driver'] = 'redfishv1'
 
         self.assertEqual(podmanagers._check_creation(values), result_values)
         mock_get_podm_status.assert_called_once_with(values['url'],

valence/validation/schemas.py

@@ -56,6 +56,7 @@ podmanager_schema = {
             'type': 'string',
             'format': 'uri',
             },
+        'driver': {'type': 'string'},
         'authentication': {
             'type': 'array',
             'minItems': 1,