Fix test_update_address_scope_shared

test_update_address_scope_shared currently fails as shared address
scope can't be unshared [1].

It would have detected in gates if neutron-tempest-plugin was
installed [2] (as it's in opnfv/functest-smoke:latest).

[1] https://github.com/openstack/neutron/blob/master/neutron/db/address_scope_db.py#L87
[2] http://logs.openstack.org/47/599047/3/check/patrole-admin/11872d4/job-output.txt.gz

Change-Id: I72f0cde1dab2d0a1949b55490375e8441394353d
Signed-off-by: Cédric Ollivier <ollivier.cedric@gmail.com>
diff --git a/patrole_tempest_plugin/tests/api/network/test_address_scope_rbac.py b/patrole_tempest_plugin/tests/api/network/test_address_scope_rbac.py
index cf73669..db28b82 100644
--- a/patrole_tempest_plugin/tests/api/network/test_address_scope_rbac.py
+++ b/patrole_tempest_plugin/tests/api/network/test_address_scope_rbac.py
@@ -121,7 +121,7 @@
         address_scope = self._create_address_scope(shared=True)
         with self.rbac_utils.override_role(self):
             self.ntp_client.update_address_scope(address_scope['id'],
-                                                 shared=False)
+                                                 shared=True)
 
     @rbac_rule_validation.action(service="neutron",
                                  rules=["get_address_scope",