End usage of FilterProperty, as per RFC-730.

Usage in dcrAssembleCoadd.py left as it is dealt with by DM-26615.

python/lsst/pipe/tasks/multiBandUtils.py

@@ -144,7 +144,7 @@ def getShortFilterName(name):
     # I'm not sure if this is the way this is supposed to be implemented, but it seems to work,
     # and its the only way I could get it to work.
     try:
-        return afwImage.Filter(name).getFilterProperty().getName()
+        return afwImage.Filter(name).getName()
     except pexExceptions.NotFoundError:
         # No mapping could be found, try proceeding with given name
         return name