Cbench - Scalable Cluster Benchmarking Code

Apply the fix of revision 673 to nodehwtest_output_parse.pl, too :).

Ignore bogus 0.000 min values being reported for tests in both statsmode and dplot.

fix a longstanding annoyance with cbench_output_parse.pl
when its output is piped and then teed to a file. there
would be hidden ansi escape codes that would break
normal grepping in weird ways unless you octaldumped
the teed file and remembered to filter the escape sequences.

the tweak is to not enable AUTORESET in ANSIColor until
detect_color_support() in cbench.pl decides to enable it.
associated with that is NOT setting AUTORESET after the
"use ANSIColor" in cbench_output_parse.pl

allow gen_jobs modules access to the %specialwalltimes hash

updated to better deal with edge cases that were
encountered

tune down amg memory requirements to fit 1.5GB/core better

add some whitespace in the output

adding a testset for the LLNL mpiGraph benchmark.

cbench_run_cmd() in cbench_functions was updated to
support a TEE_FILE variable that allows a job script
to have command line output 'teed' to the file indicated
by TEE_FILE. this was necessary so that the mpigraph_mpigraph.in
job template could tee the output to mpiGraph.out for post
processing by crunch_mpiGraph inside the job itself.

the TEE_FILE thing isn't my favorite thing, but with
all the piping/teeing already going on behind the scenes
in cbench_run_cmd(), it was the only workable way.

makefile tweak

comment tweak