Revision 1664290

On the 'move-tracking-2' branch: Use the iterpool provided by the array and
hash iteration and accessors added in r1664127.

* subversion/libsvn_delta/branch.c
  (svn_branch_purge_r,
   svn_branch_get_subbranches,
   svn_branch_delete_branch_instance_r,
   svn_branch_family_serialize,
   svn_branch_branch_subtree_r2): Use the iterpool.

* subversion/libsvn_delta/compat3e.c
  (convert_branch_to_paths_r): Use the iterpool.

* subversion/svnmover/svnmover.c
  (family_list_branch_instances): Use the iterpool.