Users can now be deleted within trove.

There's a typo in trove's DeleteUser action.

api.trove.user_delete != api.trove.users_delete

(cherry picked from commit da1ed65a46a32a0cde7bc28e4e0a755222c27f7a)

Change-Id: I7bc7b2cda15eae5325035e85c95b49dfe2bb8381
Closes-Bug: 1330513