BUG: to_datetime not localizing Series when utc=True (pandas-dev#6415)

Modify test case

Comment about test edit, move conversion logic to convert_listlike

Add new section in whatsnew and update test

Alter SQL tests

Modify whatsnew and make new wrapper function to handle UTC conversion

Simiplified whatsnew and reverted arg renaming

Author: mroeschke

doc/source/whatsnew/v0.21.0.txt

@@ -396,13 +396,10 @@ Conversion
 
 - Bug in assignment against datetime-like data with ``int`` may incorrectly convert to datetime-like (:issue:`14145`)
 - Bug in assignment against ``int64`` data with ``np.ndarray`` with ``float64`` dtype may keep ``int64`` dtype (:issue:`14001`)
-<<<<<<< 062f6f118fe4ea439ae255a8ff886a532e20ecdb
 - Fix :func:`DataFrame.memory_usage` to support PyPy. Objects on PyPy do not have a fixed size, so an approximation is used instead (:issue:`17228`)
 - Fixed the return type of ``IntervalIndex.is_non_overlapping_monotonic`` to be a Python ``bool`` for consistency with similar attributes/methods.  Previously returned a ``numpy.bool_``. (:issue:`17237`)
 - Bug in ``IntervalIndex.is_non_overlapping_monotonic`` when intervals are closed on both sides and overlap at a point (:issue:`16560`)
 - Bug in :func:`Series.fillna` returns frame when ``inplace=True`` and ``value`` is dict (:issue:`16156`)
-=======
->>>>>>> BUG: to_datetime not localizing Series when utc=True (#6415)
 
 Indexing
 ^^^^^^^^