Following up on r1550799 add more commit verification logic to the mtcc tests.

* subversion/libsvn_client/mtcc.c
  (add_commit_items): Store more information in the commit items.

* subversion/tests/libsvn_client/mtcc-test.c
  (verify_commit_baton): New struct.
  (verify_commit_callback): New function.
  (verify_mtcc_commit): Use verify_commit_callback to check the commit result.
    Add revision argument.

  (make_greek_tree,
   test_mkdir,
   test_mkgreek,
   test_swap): Update caller.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1550806 13f79535-47bb-0310-9956-ffa450edef68