bsc: add test for CM Service Reject counter

Related: I79b1261e5a281d9797eaaf9c27d90edd8e27c78b (osmo-bsc)
Related: SYS#4878
Change-Id: I0214b27da18af87eca9715ebf7eeeff945e3e12a
diff --git a/library/L3_Templates.ttcn b/library/L3_Templates.ttcn
index 997b433..e6efb68 100644
--- a/library/L3_Templates.ttcn
+++ b/library/L3_Templates.ttcn
@@ -389,6 +389,23 @@
 	}
 }
 
+template (value) PDU_ML3_NW_MS ts_CM_SERV_REJ(OCT1 rejectCause) := {
+	discriminator := '0000'B, /* overwritten */
+	tiOrSkip := {
+		skipIndicator := '0000'B
+	},
+	msgs := {
+		mm := {
+			cMServiceReject := {
+				messageType := '000000'B, /* overwritten */
+				nsd := '00'B,
+				rejectCause := rejectCause,
+				t3246_Value := omit
+			}
+		}
+	}
+}
+
 template (value) PDU_ML3_MS_NW ts_CM_REESTABL_REQ(MobileIdentityLV mi_lv) := {
 	discriminator := '0000'B, /* overwritten */
 	tiOrSkip := {