Project: datamanagement
Issue DM-2939: fix usage of obsolete astrometry interfaces in ProcessImageTask
As discussed recently on HipChat (Science Pipelines Standup), there's code in {{ProocessImageTask}} that assumes an "astrometer" attribute on a {{CalibrateTask}} instance. Since this is just needed to match a new set of sources against the reference catalog here, we should probably be using one of the new matcher objects, either by getting one from {{CalibrateTask}} via a documented interface, or by constructing a new one.
Story points: 4