Add more test cases for scan_deletion.
Add more test cases for scan_deletion.

* subversion/tests/libsvn_wc/db-test.c:
  (data_loading_sql): add more nodes to set up test scenarios
  (test_scan_deletion): test the new scenarios


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@877088 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion