Fix missing microseconds initialisation

review1000002
(transplanted from 898b5745851610dd4ccd33fdc98a06c393669fc5)

--HG--
extra : transplant_source : %89%8BWE%85%16%10%DDL%CD3%FD%C9%8A%06%C3%93f%9F%C5
Remove validation of unused XML attributes

Those XML attributes are no more allowed in XML.
The domain is not only allowed in dashboard and it is not a field domain.

issue3310
review986002
(transplanted from 4eba4934492ab6731626837e5bab3fb19f4cf053)

--HG--
extra : transplant_source : N%BAI4I%2A%B6s%16%26%83%7E%5B%AB%3F%B1%9FL%F0S