Split up the svnauthz tests more so file tests always run.

* subversion/tests/cmdline/svnauthz_tests.py
  (svnauthz_validate_test): Split into ...
  (svnauthz_validate_file_test, svnauthz_validate_repo_test): these new
    functions.
  (svnauthz_accessof_test): Split into ...
  (svnauthz_accessof_file_test, svnauthz_accessof_repo_test): these new
    functions.
  (svnauthz_accessof_is_test): Split into ...
  (svnauthz_accessof_is_file_test, svnauthz_accessof_is_repo_test): these new
    functions.
  (svnauthz_compat_mode_test): Split into ...
  (svnauthz_compat_mode_file_test, svnauthz_compat_mode_repo_test): these new
    functions.
  (test_list): Adjust for the function changes.
    


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1438760 13f79535-47bb-0310-9956-ffa450edef68