Error importing timestamps that were just exported

[katiemcculloch]

$ dolt clone pdap/datasets
$ dolt table export agencies agencies.csv
$ dolt table import -u agencies agencies.csv
Rows Processed: 0, Additions: 0, Modifications: 0, Had No Effect: 0', b'\nA bad row was encountered while moving data.\nBad Row: \nvalue "2021-04-16 15:17:31 +0000 UTC" can\'t be converted to time.Time\nThese can be ignored using the \'--continue\'\n', 1)