Timeouts with subsequent failures to delete the temporary
directories have been observed in COIN.
Previously, QProcess:terminate() was used to end the processes,
which does not have any effect on console processes on Windows.
Add a helper function which resorts to kill() on failure
to terminate().
Change-Id: I05539d1703280d34b392f2e8ff8565b9a04d703c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
b624cdac21