Update test scripts since qthreads became the default

Previously we explicitly tested qthreads in a couple of configurations. Since
qthreads is the default we now want to switch those machines to test fifo.

Also valgrind will use fifo for the time being (and maybe permanently.) We
don't have valgrind suppressions for qthreads.
Merge pull request #231 from ronawho/fix-testing-scripts-since-qthreads

Update test scripts since qthreads became the default

Previously we explicitly tested qthreads in a couple of configurations. Since
qthreads is the default we now want to switch those machines to test fifo.

Also valgrind will use fifo for the time being (and maybe permanently.) We
don't have valgrind suppressions for qthreads.