Changes

jobs/ttcn3-testsuites: remove bscnat-test{-latest}

These testsuites have been disabled for > 3 years, and the related SUT
is not developed any further. Remove the entries to unclutter the list
for now, we could add them back later easily if it makes sense.

Change-Id: I727924227809c8133a852a4adbf82bcd6508bcf1

jobs/ttcn3-testsuites{,-testenv}: add duration comments

Add the current "last duration" time from the jenkins jobs as comment,
so we have a rough idea of how long these jobs take and can distribute
them more evenly throughout the days. Even though the durations will
change over time, this gives a good indicator of whether a job runs a
few minutes or 1 or even 2 hours.

Change-Id: Iee1af60f3f76663eb7af562821a825640d53ee1e

jobs/ttcn3-testsuites{,-testenv}: update timers

Distribute the jobs better over the day.

Change-Id: I2ba6b0a6edd0d84abf6178ba6fdb677cf750bdc6