Fix file access conflict in tests under Windows: cleanup temp files only after the named atomics have been closed.
Fix file access conflict in tests under Windows: cleanup temp files
only after the named atomics have been closed.

* subversion/tests/libsvn_subr/named_atomic-test.c
  (cleanup_test_shm): turn into an APR pool cleanup function
  (init_test_shm): register the cleanup
  (test_basics,
   test_bignums,
   test_multiple_atomics,
   test_namespaces,
   test_multithreaded,
   test_multiprocess): remove explicit cleanup function calls

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1404125 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion