primary thor's can't be determined lbase on !nodeGroup

This IConstWUClusterInfo could have disparate ThorCluster's on different groups, being part of the same logical cluster (IConstWUClusterInfo) means they will be load balanced on the same queue, but they may all be 'primary'.

You'll need to look at all 'thorProcesses' and exclude those whose group name's don't match the thor names.