[dvs] Re-enable RIF tests (#1249)

Signed-off-by: Danny Allen <[email protected]>

Author: daall

tests/test_interface.py

@@ -4,7 +4,6 @@
 
 from swsscommon import swsscommon
 
-@pytest.mark.xfail(reason="vs image issue: Azure/sonic-sairedis#574")
 class TestRouterInterface(object):
     def setup_db(self, dvs):
         self.pdb = swsscommon.DBConnector(0, dvs.redis_sock, 0)
@@ -938,6 +937,7 @@ def test_LagInterfaceAddRemoveIpv4Address(self, dvs, testlog):
         # remove port channel
         self.remove_port_channel("PortChannel001")
 
+    @pytest.mark.skip(reason="vs image issue: Azure/sonic-sairedis#574")
     def test_LagInterfaceSetMtu(self, dvs, testlog):
         self.setup_db(dvs)