Made backend data manipulation in test more stable

(it was failing on some machines because primitiveInt came last and lacked a trailing
comma the JSONObject's string representation)
errai-jpa-demo-todo-list - added disability to add an empty item
Merge pull request #37 from smiklosovic/master

errai-jpa-todo-list - added disability to add an empty item to the todo list
Better fix for ERRAI-489: @Bound should default to field name rather than the name given in @DataField
Merge branch 'master' into 3.0

Conflicts:
	errai-ui/src/main/java/org/jboss/errai/ui/rebind/DecoratorTemplated.java