For now revert r1489928, to unbreak the trunk build of JavaHL.

Either the JavaHL expectations should be fixed or a better fix should be
implemented to make the status users handle invalid status targets.

The JavaHL problem shows that it is not really possible to apply this
change in a fully backward compatible way. Most callers currently ignore
this problem but would be better of with an easy to detect specific error.

* subversion/libsvn_wc/status.c
  (svn_wc__internal_walk_status): Return success for non-existing,
    non-versioned targets in a working copy. Reverting.

* subversion/tests/cmdline/commit_tests.py
* subversion/tests/cmdline/stat_tests.py
* subversion/tests/cmdline/tree_conflict_tests.py
  Revert


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1490380 13f79535-47bb-0310-9956-ffa450edef68