When generating ListObject from imported Excel workbook, ensure column names do not have trailing space

[Brian Lewis]

Trailing space in the field may occur in Excel and not be easy to detect.

causes different Xml representation.

Make sure there is not a trailing space on a column name

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REason behind failure to upload Date of hire to teacher

[Brian Lewis]

fix(census): teacher date of hire, close reason notupdating

Resolves #615, #624

→ <<cset 83c468e6d272>>