Make time zone for FlexibleDateConverter configurable #1166
Please remember to also update the flexible date converter docs.
Should we somehow mention this in the 1.1 upgrade guide? Because the behavior has been changed unintentionally in 0cc9a99￼ (Nov 2014). The code comment and documentation says that the local time zone will be used.
/cc @lennartkoopmann because you wrote this one
Unfortunately DateTimeZone.UTC and DateTimeZone.forID("Etc/UTC") are not equal but actually are for all practical reasons. Refs #1166