suites: Wait for BTS to connect to BSC before continuing

Change-Id: I027e3bfb8f470a811e65e718e2a8c46809fe6396
diff --git a/suites/aoip_debug/interactive.py b/suites/aoip_debug/interactive.py
index 312083a..b08bac1 100755
--- a/suites/aoip_debug/interactive.py
+++ b/suites/aoip_debug/interactive.py
@@ -26,6 +26,8 @@
 bsc.start()
 
 bts.start()
+print('Waiting for bts to connect to bsc...')
+wait(bsc.bts_is_connected, bts)
 print('Waiting for bts to be ready...')
 wait(bts.ready_for_pcu)
 pcu.start()