Disable final part of tests/feature/Object.js pending wider adoption …
Disable final part of tests/feature/Object.js pending wider adoption …

…of node 4.1; see issue #1991

@arv TBR

Review URL: https://api.github.com/repos/google/traceur-compiler/issues/1992

Closes #1992.

google/traceur-compiler,sebgod/traceur-compiler,arv/traceur-compiler,google/traceur-compiler,johnjbarton/traceur-compiler,johnjbarton/traceur-compiler,sebgod/traceur-compiler,arv/traceur-compiler