bsc: replace octet string with decmatch when matching RR RELEASE

The 'decmatch' keyword allows us to match the decoded version of some
octetstring, which is very useful in the situations where we have
the L3 message only as octetstring but want to check if it matches
some L3 template.

Change-Id: I0a91e067f7e8062bf991fef8b0d4d8da740bfafc
3 files changed