Changes

open5gs: Enable libmetrics prometheus implementation

metrics support using Prometheus has been recently added to open5gs
(28e40a0f1b9048768958344e213c69994be671f5). However, it is still not
enabled by default. Let's enable it and update open5gs config files to
make use of it.

Change-Id: I6ec827d66241e20d631f3a851457921718c168a0

ttcn3-bsc-test/jenkins-sccplite.sh: configure 4 TRX for BTS2

This is another fixup for [1].  I didn't notice that the sccplite
variant of ttcn3-bsc-test has its own copy of jenkins.sh.

Change-Id: I21219724adbeda4166963b4940b08aad281a62cb
Fixes: [1] Iba4fbd5c9ed59783df4ac64e68b2beef73a812ff
Related: SYS#5460

ttcn3-bsc-test/jenkins-sccplite.sh: fix missing osmo-bts-omldummy logs

Change-Id: I823c34a754701dc71cd52df0ca660bd8fe3c02ab