In 'svn cp A B' run the workqueue per directory instead of per file, like how
we do this in similar operations.

The db reflects that the operation was already done and the workqueue ensures
that the operation will be performed eventually. This matches how we do this
in operations like update and commit. In general performance is much better
if we run the workqueue in batches.

* subversion/libsvn_wc/copy.c
  (copy_versioned_file): Remove unneeded ensurance that was added during WC-NG
    conversion work.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1632286 13f79535-47bb-0310-9956-ffa450edef68