Fix Version/s: None
DM-9873 added support for None to be added to PropertyList. Update afw FITS reading to support undefined values.
- is triggered by
DM-9873 PropertySet does not support values of None
Paul Price thanks for agreeing to review. The changes are at https://github.com/lsst/afw/pull/446/files and depend on
DM-9873changes to daf_base.
The substantive changes are small, with the bulk of the PR being test changes.