library/MGCP_Templates: add send template ts_MgcpResp_Err

Change-Id: Ib0462228cece29952c91b4d18ebe2d89fed70c03
Related: OS#5572
diff --git a/library/MGCP_Templates.ttcn b/library/MGCP_Templates.ttcn
index 2fd9b18..e5a05bc 100644
--- a/library/MGCP_Templates.ttcn
+++ b/library/MGCP_Templates.ttcn
@@ -64,7 +64,20 @@
 	/* osmo-bsc_mgcp implements L/C/M/X only, osmo-mgw adds 'I' */
 	/* SDP: osmo-bsc_mgcp implements Tx of v,o,s,c,t,m,a */
 
-	template MgcpResponse tr_MgcpResp_Err(template MgcpResponseCode code) := {
+	template (value) MgcpResponse
+	ts_MgcpResp_Err(template (value) MgcpTransId trans_id,
+			template (value) MgcpResponseCode code,
+			template (value) charstring string := "FAIL") := {
+		line := {
+			code := code,
+			trans_id := trans_id,
+			string := string
+		},
+		params := {},
+		sdp := omit
+	}
+	template MgcpResponse
+	tr_MgcpResp_Err(template (present) MgcpResponseCode code) := {
 		line := {
 			code := code,
 			trans_id := ?,