BUG: make sure partial setting with a Series like works with a completly empty frame  (GH5632)
Merge pull request #5633 from jreback/setitem_empty

BUG: make sure partial setting with a Series like works with a completly empty frame (GH5632)
BUG: Validate levels in a multi-index before storing in a HDFStore (GH5527)
Merge pull request #5634 from jreback/hdf_mi

BUG: Validate levels in a multi-index before storing in a HDFStore (GH5527)
CLN: expand groupby dispatch whitelist (GH5480)

- Create separate whitelists for SeriesGroupBy and DataFrameGroupBy objects
- Improve groupby whitelist testing