MSC_ConnectionHandler: Optionally check MM Info

The MM Info message is an optional message that is set to the MS usually
after the location update. It contains the full network name and time
information. At the moment the presence of this message is not checked
or expected since sending of MM-Info is explicitly disabled in the
osmo-msc configu.

This patch adds an optional check of MM Info that is disabled by
default.

Change-Id: I431f50c2ff3536f87f0c7c3caf23b7a38d501904
Related: OS#3615
diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index d121b63..0ac61bc 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -95,6 +95,7 @@
 	integer mp_msc_vty_port := 4254;
 
 	/* local parameters of emulated HLR */
+	boolean mp_mm_info := false;
 	charstring mp_hlr_ip := "127.0.0.1";
 	integer mp_hlr_port := 4222;
 	charstring mp_mgw_ip := "127.0.0.1";
@@ -457,7 +458,8 @@
 		send_early_cm := true,
 		ipa_ctrl_ip := mp_msc_ip,
 		ipa_ctrl_port := mp_msc_ctrl_port,
-		ipa_ctrl_enable := true
+		ipa_ctrl_enable := true,
+		mm_info := mp_mm_info
 	};
 	return pars;
 }
@@ -855,6 +857,9 @@
 		}
 	}
 
+	/* Wait for MM-Information (if enabled) */
+	f_expect_mm_info();
+
 	/* wait for normal teardown */
 	f_expect_clear();
 }