TST/CLN: moved the legacy tests out of tseries/test_timeseries.py to tseries/test_timeseries_legacy.py
BUG: (GH4758) Bug in multi-indexing with a partial string selection as one part of a MultIndex
Merge pull request #4761 from jreback/dt_multi

BUG: in multi-indexing with a partial string selection (GH4758)