MGCP_Test: Test non LCO crcx

When a CRCX without an LCO option (codec) is sent, then older versions
of osmo-mgw will omit the port number in the SDP part of the response.
Also no default codec is selected and reported back. This testcase
pinpoints the problem.

Change-Id: Ie16cdab936ce468fe378d4ec9e1c61f81c07fb4e
Related: OS#2658
diff --git a/library/MGCP_Templates.ttcn b/library/MGCP_Templates.ttcn
index e509da8..9d6dea6 100644
--- a/library/MGCP_Templates.ttcn
+++ b/library/MGCP_Templates.ttcn
@@ -80,6 +80,15 @@
 		sdp := sdp
 	}
 
+	template MgcpCommand ts_CRCX_no_lco(MgcpTransId trans_id, charstring ep, MgcpConnectionMode mode, MgcpCallId call_id, template SDP_Message sdp := omit) := {
+		line := t_MgcpCmdLine("CRCX", trans_id, ep),
+		params := {
+			t_MgcpParConnMode(mode),
+			ts_MgcpParCallId(call_id)
+		},
+		sdp := sdp
+	}
+
 	template MgcpCommand tr_CRCX(template MgcpEndpoint ep := ?) := {
 		line := t_MgcpCmdLine("CRCX", ?, ep),
 		params := *,