Fix merge_tests-45, merge_tests-78, blame_tests-10, blame_tests-11 over bdb.
Fix merge_tests-45, merge_tests-78, blame_tests-10, blame_tests-11 over bdb.

* subversion/libsvn_fs_base/tree.c
  (txn_body_change_node_prop, merge, txn_body_delete, txn_body_copy):
   db-format number need to be compared with '>=' not just '>'.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@869168 13f79535-47bb-0310-9956-ffa450edef68

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