Skip CTestLimitDashJ test on Borland

The Borland-built CTest binary has trouble running many instances of
itself in parallel, making the test unreliable.  No particular recent
change appears to be the culprit and the failure is not reliably
reproducible.  Just silence the failure for now by skipping the test.
Merge topic 'borland-no-CTestLimitDashJ' into next

cd345aa Skip CTestLimitDashJ test on Borland