* subversion/svnadmin/svnadmin.c
  (repos_notify_handler): say "metadata" instead of "structure" in
   repo verification callbacks

Suggested by: julianfoad

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1439211 13f79535-47bb-0310-9956-ffa450edef68
Follow-up to r1435746:  Push user notification in svn_fs_fs__verify
from svn_fs_fs__walk_rep_reference down to verify_walker.  Also,
canonicalize svn_fs_fs__walk_rep_reference's parameter order.

* subversion/libsvn_fs_fs/fs_fs.c
  (verify_walker_baton_t): add members required for user notification 
  (verify_walker): call user notification here
  (svn_fs_fs__verify): init extended walker baton; do initial notification

* subversion/libsvn_fs_fs/rep-cache.h
  (svn_fs_fs__walk_rep_reference): remove notify* params, reoder the rest

* subversion/libsvn_fs_fs/rep-cache.c
  (svn_fs_fs__walk_rep_reference): update implementation

Suggested by: julianfoad

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1439212 13f79535-47bb-0310-9956-ffa450edef68