Change default to on for building coprocessing
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
Currently the default is for the coprocessing plugin and the coprocessing library to not be built. Subsequently, it isn't getting tested on very many machines (only amber5 which is going to be decommissioned). I want to turn it them on by default since they don't introduce any extra dependencies besides python to paraview.