Support update tier0 in policy tier1 router

Change-Id: I6de8a97dcabacbbccca79ba03ece762f94b7a6fe

vmware_nsxlib/tests/unit/v3/test_policy_resources.py

@@ -1608,13 +1608,15 @@ class TestPolicyTier1(NsxPolicyLibTestCase):
     def test_update(self):
         id = '111'
         name = 'new name'
+        tier0 = 'tier0'
         with mock.patch.object(self.policy_api,
                                "create_or_update") as update_call:
             self.resourceApi.update(id,
-                                    name=name,
+                                    name=name, tier0=tier0,
                                     tenant=TEST_TENANT)
             expected_def = policy_defs.Tier1Def(tier1_id=id,
                                                 name=name,
+                                                tier0=tier0,
                                                 tenant=TEST_TENANT)
             self.assert_called_with_def(
                 update_call, expected_def)

vmware_nsxlib/v3/policy_resources.py

@@ -563,15 +563,16 @@ class NsxPolicyTier1Api(NsxPolicyResourceBase):
 
     def update(self, tier1_id, name=None, description=None,
                force_whitelisting=None,
-               failover_mode=None,
+               failover_mode=None, tier0=None,
                tags=None,
                tenant=policy_constants.POLICY_INFRA_TENANT):
-
+        # TODO(asarfaty): Support tier0=None fore reseting the tier0 value
         self._update(tier1_id=tier1_id,
                      name=name,
                      description=description,
                      force_whitelisting=force_whitelisting,
                      failover_mode=failover_mode,
+                     tier0=tier0,
                      tags=tags,
                      tenant=tenant)