ctrl: Implement a global result for rf_locked

Create a one stop command to give a statement for the
entire network. This can be used to check the policy
and the state of the entire network.
diff --git a/openbsc/tests/ctrl_test_runner.py b/openbsc/tests/ctrl_test_runner.py
index 160333d..9e56457 100644
--- a/openbsc/tests/ctrl_test_runner.py
+++ b/openbsc/tests/ctrl_test_runner.py
@@ -305,6 +305,11 @@
         self.assertEquals(r['var'], 'bts.0.rf_state')
         self.assertEquals(r['value'], 'inoperational,locked,off')
 
+        r = self.do_get('rf_locked')
+        self.assertEquals(r['mtype'], 'GET_REPLY')
+        self.assertEquals(r['var'], 'rf_locked')
+        self.assertEquals(r['value'], 'state=off,policy=off')
+
         r = self.do_set('rf_locked', '0')
         self.assertEquals(r['mtype'], 'SET_REPLY')
         self.assertEquals(r['var'], 'rf_locked')
@@ -317,6 +322,11 @@
         self.assertEquals(r['var'], 'bts.0.rf_state')
         self.assertEquals(r['value'], 'inoperational,unlocked,on')
 
+        r = self.do_get('rf_locked')
+        self.assertEquals(r['mtype'], 'GET_REPLY')
+        self.assertEquals(r['var'], 'rf_locked')
+        self.assertEquals(r['value'], 'state=off,policy=on')
+
     def testTimezone(self):
         r = self.do_get('bts.0.timezone')
         self.assertEquals(r['mtype'], 'GET_REPLY')