Unskip test_rescope_token()

test_rescope_token() was skipped  because of bug 1351026 which is now
in a state which should allow us to unskip it.

Change-Id: Ia0fd713fea041c24f4ff1f041a48d9bac7fef6e7
Related-Bug: #1351026
Merge "Unskip test_rescope_token()"