Split test case for issue #4118 into six separate test cases.

* subversion/tests/cmdline/wc_tests.py:
  (status_with_various_degrees_of_broken_wc): Removed.
  (status_with_inaccessible_wc_db,
   status_with_corrupt_wc_db,
   status_with_zero_length_wc_db,
   status_without_wc_db,
   status_with_missing_wc_db_and_maybe_valid_entries):
    Break out individual tests from status_with_various_degrees_of_broken_wc.
  (status_without_wc_db_and_entries): Additional wc.db-related test.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1428750 13f79535-47bb-0310-9956-ffa450edef68