mdf run() fails to incorporate tzinfo when passed a pandas.DateRange

pandas.DateRange is deprecated. If run() is passed a date_range parameter constructed from pandas.DateRange it will actually be of time DatetimeIndex. Consequently run() fails to extract tzinfo from date_range since it checks to see if date_range has type pandas.DateRange first. The workaround is to pass in a tzinfo parameter explicitly to run(). The fix should be to remove the dependence on pandas.DateRange.

Start at the run() implementation and inspect how its date_range parameter checks for pandas.DateRange before extracting tzinfo. Reproduce the issue with a pandas DatetimeIndex created from a date range, then verify that timezone information is handled without requiring an explicit tzinfo parameter.

Written by the indexing model from the issue text.