Signed-off-by: NMykola Nikishov <mn@mn.com.ua>

Commit 3f1f53f2 introduced autocompletion for label expression text
box on project configuration page. But with a typo in a textbox's
attribute in configure-common.jelly and hudson-behavior.js.

Commit 39a93420 fixed this typo in hudson-behavior.js, this one fixes
other part in configure-common.jelly.

It looks like this is a left over or a mistake.
We haven't been shipping junit.jar in the hudson.war, and
core has no compile time dependency to junit classes.

spinning the test annotations off to a library so that it can be used in other places, like in the core

Having a calendar with the first day of week being Monday (such as in the en_GB locale), setting DoW to Sunday moves the calendar forward whereas in cron it expects the calendar to go backward in time.

 Adjusting this logic.