CLOUDSTACK-4396: Invalid case comparison leaves egress rule unprogrammed

Thereby failing the wget for the cloud-setup-guest-password script which
in turn fails the test.
Signed-off-by: Prasanna Santhanam <tsp@apache.org>
(cherry picked from commit 8576b1ddc9)

test/integration/component/test_vm_passwdenabled.py

@@ -135,7 +135,7 @@ class TestVMPasswordEnabled(cloudstackTestCase):
         networkid = cls.virtual_machine.nic[0].networkid
 
         # create egress rule to allow wget of my cloud-set-guest-password script
-        if zone.networktype.lower == 'advanced':
+        if zone.networktype.lower() == 'advanced':
             EgressFireWallRule.create(cls.api_client,
                                   networkid=networkid,
                                   protocol=cls.services["egress"]["protocol"],