On the 'move-tracking-2' branch: Tweak error handling and testing so that
both of the tests in svnmover_tests.py pass.

* subversion/libsvn_delta/compat3.c
  (repos_find_el_rev_by_path_rev): Raise an error instead of an assertion
    failure for a bad revision number.

* subversion/svnmover/svnmover.c
  (VERIFY_EID_NONEXISTENT,
   VERIFY_EID_EXISTS): Tweak error messages to be more like those 'svnmucc'
    gives.

* subversion/tests/cmdline/svnmover_tests.py
  (xtest_svnmover): Handle expected errors more like the 'run_and_verify_*'
    functions do.
  (basic_svnmover): Delete the parts associated with testing properties, as
    'svnmover' doesn't currently support property operations. Tweak the
    expected error messages.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/move-tracking-2@1638728 13f79535-47bb-0310-9956-ffa450edef68