Wrong error when adding keywords

[jthorton]

Describe the bug

When adding keywords to a collection with the same alias and program I think the wrong error is raised this should be a KeyError but an AttributeError is raised.

To Reproduce

client = FractalClient()
ds = client.get_collection('Dataset','OpenFF Discrepancy Benchmark 1')
# get the keywords
kw = ds.get_keywords('default', 'psi4')
# try and add them again to the collection
ds.add_keywords(alias='default', program='psi4', keyword=kw, default=False)

Expected behavior

Should raise the KeyError defined here

QCFractal/qcfractal/interface/collections/dataset.py

Line 1315 in 331f91c

raise KeyError("Alias '{}' already set for program {}.".format(alias, keyword.program))

Additional context

[bennybp]

Should be a simple fix. I think keyword.program should be replaced by just program in that exception

[bennybp]

Fixed in PR #638