Running resample with in_memory=False reads all models into memory

[stscijgbot-jp]

Issue JP-3621 was created on JIRA by Brett Graham:

ResampleStep when run with in_memory=False reads all models into memory. For a 33 member association the memory usage is shown in the attached graph.

One line that reads all models is:

jwst/jwst/resample/resample_step.py

Line 67 in 8b254ae

input = datamodels.open(input)