Running skymatch with minimize_memory opens 2x files for each input association member

[stscijgbot-jp]

Issue JP-3620 was created on JIRA by Brett Graham:

When skymatch is run with minimize_memory it will write out and keep open 2x temporary files for every member of the input association. For large associations (hundreds of members) this can lead to failed runs where the step exceeds the allowed number of open files (using the default value on some systems).

See relevant code here:

jwst/jwst/skymatch/skyimage.py

Line 77 in 8b254ae

self._tmp = tempfile.NamedTemporaryFile(