Fix issue 4412, locks getting lost during update.  The root cause
was some buggy client code added as a workaround for an old server
bug.  The server bug was fixed by r869988 and released in 1.5.0. The
client side fix doesn't work and even if it did it is only needed
by clients using pre-1.5 servers if they force http-bulk-updates=no.
Removing the buggy client-side workaround fixes issue 4412 allowing
1.8 clients to use locks with 1.6 servers before 1.6.17.

* subversion/libsvn_ra_serf/update.c
  (struct report_context_t): Remove token hash.
  (create_file_baton): Don't get token from hash.
  (set_path, link_path): Don't store token in hash.
  (make_update_reporter): Don't create hash.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1584342 13f79535-47bb-0310-9956-ffa450edef68