art test for monitoring hgtd clusters
This adds a simple ART test for monitoring specifically the xAOD-based HGTD clusters. As of now I simply convert the cluster EDM from the output of the current clusterisation algorithm, in the future we'll also have an ACTS based algorithm that will produce xAOD HGTD clusters directly. The two can then be compared with dcube
Changes also to IDPVM for ACTS that now is able to analyse different collections according to what is stored in the input file.