Modified tests to handle datetime, bugfix

* jquery-timeEntry not being used. Was giving an error on http://127.0.0.1:8000/eden/inv/send/create
* Modified tests to handle datetime fields in http://127.0.0.1:8000/eden/hrm/training_event/create. 

These errors were pointed in the daily Selenium tests results - http://82.71.213.53/RESULTS/SELENIUM/IFRC/Sahana-Eden-2013-07-06%2000-04-06.525425.html