bsc: test Classmark Enquiry

Enhance TC_classmark to also include the BSSMAP Classmark Request -> RR
Classmark Enquiry part. So far it was only testing the return path of RR
Classmark Change -> BSSMAP Classmark Update.

This test will thus fail with current osmo-bsc master, and will succeed as soon
as osmo-bsc If5db638fd6e8d9c2ef9e139e99f0fabe1ef16ddf is merged.

Add:

* ts_BSSMAP_ClassmarkRequest in BSSMAP_Templates.ttcn
* tr_RRM_CM_ENQUIRY in L3_Templates.ttcn

Change-Id: Idaab4d568cf986b4897ba008f6262c839d1592fb
diff --git a/library/L3_Templates.ttcn b/library/L3_Templates.ttcn
index 557b1b8..1ce84cf 100644
--- a/library/L3_Templates.ttcn
+++ b/library/L3_Templates.ttcn
@@ -525,6 +525,21 @@
 	}
 }
 
+template PDU_ML3_NW_MS tr_RRM_CM_ENQUIRY := {
+	discriminator := '0110'B,
+	tiOrSkip := {
+		skipIndicator := '0000'B
+	},
+	msgs := {
+		rrm := {
+			classmarkEnquiry := {
+				messageType := '00010011'B,
+				classmarkEnquiryMask := *
+			}
+		}
+	}
+}
+
 template (value) PDU_ML3_MS_NW ts_RRM_UL_REL(OCT1 cause) := {
 	discriminator := '0110'B,
 	tiOrSkip := {