Correcting CMakeList to compile and install Serial/Parralel version only when needed
libvtkavtdatabase and libvtkavtpipeline were previously built in serial and parralel version when compiling with VISIT_PARALLEL
It is not necessary.
libvtkavtdatabase and libvtkavtpipeline were previously built in serial and parralel version when compiling with VISIT_PARALLEL
It is not necessary.