Before this commit, the changed test sometimes failed because the
autocomplete dropdown wasn't opened yet when we tried to click on
one of its items. Setting the autocomplete delay to 0 doesn't
remove the setTimeout, but overriding the setTimeout method from
browser like this commit does ensures the callback (i.e. the
dropdown opening) is called directly.
Fixes runbot error 15715
closesodoo/odoo#111178
Signed-off-by: Lucas Perais (lpe) <lpe@odoo.com>