Project: datamanagement
Issue DM-5798: Pass butler to ref loader
The design of the indexed reference catalogs requires a butler to be sent to the loader. This requires passing the butler down through the chain of subtasks from the parent command line task. In this case, I believe only calibrateTask constructs sub-tasks that requires a reference catalog. This will also require moving the loader and indexer to meas_astrom, otherwise it will introduce a circular dependency.
Story points: 4