Follow-up to r1589048:
Fix deprecation warnings by (trivally) updating callers.

* subversion/libsvn_ra_local/split_url.c
  (svn_ra_local__split_URL): Upgrade call to latest API; no separate
                             scratch pool available.

* subversion/tests/libsvn_repos/dump-load-test.c
  (test_dump_r0_mergeinfo): Tests need no extra flags for txn control.
                            Trivially upgrade call to latest API.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1597415 13f79535-47bb-0310-9956-ffa450edef68