Test that 'svnadmin freeze' is nestable.
Test that 'svnadmin freeze' is nestable.

Review by: julianfoad

* subversion/tests/cmdline/svnadmin_tests.py
  (freeze_freeze): New test.
  (test_list): Run it.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1585535 13f79535-47bb-0310-9956-ffa450edef68

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