Since we'll now log the script and its children output to a file, let's
make sure the loop doesn't run countless times upon failing child
process, producing lots of potential undesired output. For instance, if
osmo-bts fails to read vty config and exits immediately.
Change-Id: Icc8cac889d94d4cce7d6365781d5b5364404b5b9
This will enable us to run the PCU testsuite automatically by
jenkins, just like for other Osmocom projects.
Change-Id: Ia8e2ed2e7d03b8afdc7b1e068f94b0544a8112c7
Related: OS#2890