Trying out a different scheduler for chap03 qthreads perf testing

[not reviewed]

Trying out the default scheduler for single-threaded shepherds (nemesis) and
forcing the testing to use a single worker per shepherd to ensure the shepherds
are only being used in a single threaded manner. The scheduler that has been
used up until now is the default multi-threaded shepherd one (sherwood.)

I'm using chap03 qthreads perf testing as a playground of sorts. Ignore tests
results if there's any issues for chap03 qthreads testing. This does not affect
chap03 fifo performance testing.


git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@23694 3a8e244f-b0f2-452b-bcba-4c88e055c3ca