fixed a vtree copy bug that was caused by a traits issue (after a deepcopy, some things in the __dict__ were not showing up in _alltraits()
oops, had actual fix commented out in order to make sure the test failed
removed derivative output being written to stdout during openmdao test
Merge pull request #1665 from naylor-b/traits_bug

traits issue was causing the copy of a vartree not to work.  Also removed some unwanted derivative output during openmdao test.