ctrl: Introduce CTRL command subscriber.by-*.aud2g <algo[,ki]>

This command provides getter and setter to set and retrieve the
authentication data for 2g subscribers.

Change-Id: Ibebac232fa173bce8a075cacf477214d5bdb590f
Related: SYS#5993
diff --git a/tests/test_subscriber.ctrl b/tests/test_subscriber.ctrl
index 889f0a7..dadad35 100644
--- a/tests/test_subscriber.ctrl
+++ b/tests/test_subscriber.ctrl
@@ -671,5 +671,20 @@
 periodic_rau_tau_timer	0
 lmsi	00000000
 
-SET 112 subscriber.delete 901991234567891
-SET_REPLY 112 subscriber.delete 124
+GET 112 subscriber.by-imsi-901991234567891.aud2g
+GET_REPLY 112 subscriber.by-imsi-901991234567891.aud2g none
+
+SET 113 subscriber.by-imsi-901991234567891.aud2g xor,c01ffedc1cadaeac1d1f1edacac1ab0a
+SET_REPLY 113 subscriber.by-imsi-901991234567891.aud2g OK
+
+GET 114 subscriber.by-imsi-901991234567891.aud2g
+GET_REPLY 114 subscriber.by-imsi-901991234567891.aud2g XOR,c01ffedc1cadaeac1d1f1edacac1ab0a
+
+SET 115 subscriber.by-imsi-901991234567891.aud2g none
+SET_REPLY 115 subscriber.by-imsi-901991234567891.aud2g OK
+
+GET 116 subscriber.by-imsi-901991234567891.aud2g
+GET_REPLY 116 subscriber.by-imsi-901991234567891.aud2g none
+
+SET 117 subscriber.delete 901991234567891
+SET_REPLY 117 subscriber.delete 124