temprevert "Datepicker locale support"

This commit broke all tripleo ci jobs, DATEPICKER_LOCALE doesn't appear
to be getting set in _scripts.html.
This tempreverts commit 78c917570e2182bfdd8f5cb7eb5cb2c71d8df6f0.

Change-Id: I86028b9541861fb024f2a1730bf8e14162a34f2f