cdms variables lost attribute (units. ect) after applying cdutil.YEAR()

[chengzhuzhang]

Attributes such as long_name, units.ect should stay. Might be a bug in the cdutil code...

[github-actions]

Marking issue as stale, since there has been no activity in 30 days.

Unless the issue is updated or the 'stale' tag is removed, this issue will be closed in 7 days.

[durack1]

@chengzhuzhang @jasonb5 I agree, when some calculations are performed (e.g. climatological averaging, with cdutil.year) all attributes, including units should be preserved. Obviously when another calculation, multiplication, addition etc occur this is not a reasonable assumption