attempt to capture core dump from osmo-stp during ttcn3-bsc-test run
When launching osmo-stp-master from ttcn3-bsc-test, set ulimit=-1 to allow core files.
In osmo-stp-master set WORKDIR to /data to hopefully get the core file ending up there without the need to set a /proc/sys/kernel/core_pattern globally in the jenkins slave.
