Support in cord-tester for aaa-proxy using sadis app.
And various other changes that moves support for aaa to ONOS 1.10.3 and upwards.

Change-Id: Id911812caf2e1c1bd78107e57175d190241812ff
diff --git a/src/test/voltha/volthaTest.py b/src/test/voltha/volthaTest.py
index 74bae52..4cced32 100644
--- a/src/test/voltha/volthaTest.py
+++ b/src/test/voltha/volthaTest.py
@@ -383,11 +383,7 @@
 
     @classmethod
     def onos_aaa_load(cls):
-        aaa_dict = {'apps' : { 'org.opencord.aaa' : { 'AAA' : { 'radiusSecret': 'radius_password',
-                                                                'radiusIp': '172.17.0.2' } } } }
-        radius_ip = os.getenv('ONOS_AAA_IP') or '172.17.0.2'
-        aaa_dict['apps']['org.opencord.aaa']['AAA']['radiusIp'] = radius_ip
-        cls.onos_load_config('org.opencord.aaa', aaa_dict)
+        OnosCtrl.aaa_load_config()
 
     @classmethod
     def onos_dhcp_table_load(self, config = None):