Detect the number of cores on the host system, use that
Detect the number of cores on the host system, use that

The arbitrary 5 is far too few for many modern systems, detect this
dynamically and use it.

cjh1/tomviz-superbuild,mathturtle/tomviz-superbuild,cjh1/tomviz-superbuild,OpenChemistry/tomviz-superbuild,mathturtle/tomviz-superbuild,OpenChemistry/tomviz-superbuild