SCHEDULING-2253: Use Java 7 language features
SCHEDULING-2253: Use Java 7 language features

Change-Id: I1751d01dfe04b34a648101c2642355bf84471959

paraita/programming,ow2-proactive/programming,lpellegr/programming,ow2-proactive/programming,fviale/programming,ow2-proactive/programming,lpellegr/programming,paraita/programming,lpellegr/programming,fviale/programming,fviale/programming,fviale/programming,lpellegr/programming,ow2-proactive/programming,lpellegr/programming,paraita/programming,ow2-proactive/programming,paraita/programming,paraita/programming,ow2-proactive/programming,fviale/programming,lpellegr/programming,paraita/programming,fviale/programming