Revert "fixed bug that gives warning when new requirement is created; setPriority, setStatus and setIteration now also take a flag to indicated whether the requirement is being newly created or not"

This reverts commit 5cb37977b00cb0e701df800713c83eb6961d0ab8, reversing
changes made to 0e14815826deee2490e072466d4885c6beb63c9e.