Add a test case for 'svn log --auto-moves".

* subversion/tests/cmdline/svntest/main.py
  (server_has_auto_move): new feature presense test

* subversion/tests/cmdline/log_tests.py
  (renaming_history_repos): repo creation code factored out from
                            log_multiple_revs_spanning_rename;
                            added a cyclic rename as rev 5
  (log_multiple_revs_spanning_rename): use new function to create the repo
  (verify_move_log,
   log_auto_move): new test code
  (test_list): register new test


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1534280 13f79535-47bb-0310-9956-ffa450edef68