Fail karma runner when testsuite is defined but contain no tests or assertions

[shahzeb79]

Hi colleagues,
In S4 if some team has qunit and opa tests defined and loaded but OPA tests contains no tests or assertion, than runner should fail with error of "Suite with no tests should be removed". This happened when someone comment out testfiles in Alljourneys and runner still loads Alljourney but than reports no tests. In this case we see low coverages and team complains about it. So we want to configure runner so that we centrally can define some parameter in karma conf file to enable or disable failure in case of no tests.

Thanks