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
3 files changed