Resolve test error introduced by r1185242.
Resolve test error introduced by r1185242.

* subversion/tests/libsvn_wc/op-depth-test.c
  (open_wc_db): Open the database writable instead of relying on the global
    cache to make the database writable.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1185280 13f79535-47bb-0310-9956-ffa450edef68

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