On the 'move-tracking-2' branch: Add some assertions and a self-test
to the 'svnmover' program.

* subversion/svnmover/svnmover.c
  (...several functions...): Add assertions.
  (fetch_repos_info): Add a self-test.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/move-tracking-2@1627493 13f79535-47bb-0310-9956-ffa450edef68