Update Html5DateTimeFormat.groovy time() function - to get it work with actual version of Joda-Time

There was bug in Joda-time DateTimeFormatter which was fixed in version 2.2. See http://www.joda.org/joda-time/upgradeto220.html for more info.

So when Joda-Time >=2.2 is used, DateTimeFormatter stoped working.

This fixed implementation will work with old (2.0) and all newer versions to..