Fix xlc compiler bug with nek500 jl library

git-svn-id: svn+ssh://portal-auth.nersc.gov/project/projectdirs/visit/svn/visit/trunk@23353 18c085ea-50e0-402c-830e-de6fd14e8384
ctest support

compact special windows cases, make unix like use the
python as reported by visit cmake config, add libsim
tests, use --fuzzy --avgdiff=2 so tests more pass on
apple



git-svn-id: svn+ssh://portal-auth.nersc.gov/project/projectdirs/visit/svn/visit/trunk@23354 18c085ea-50e0-402c-830e-de6fd14e8384
Update the revision number of the last test suite pass.

git-svn-id: svn+ssh://portal-auth.nersc.gov/project/projectdirs/visit/svn/visit/trunk@23355 18c085ea-50e0-402c-830e-de6fd14e8384
I corrected a compilation error on Windows introduced by my modifications to avtDataRepresentation.



git-svn-id: svn+ssh://portal-auth.nersc.gov/project/projectdirs/visit/svn/visit/trunk@23356 18c085ea-50e0-402c-830e-de6fd14e8384