specify WORKING_DIRECTORY as a test property

Minor change to address a test failure reported by amber10.kitware.

While looking into this issue, I noticed that WORKING_DIRECTORY
was being passed onto ctest's command line.  To work around this
issue, we now instead specify WORKING_DIRECTORY as a test property
instead.
Merge topic 'ctest_rerun_failed' into next

28d0c03 specify WORKING_DIRECTORY as a test property