test_cls_numops: fix iterator use
CID
1322828 (#1 of 1): Wrapper object use after free (WRAPPER_ESCAPE)
28. use_after_free: Using invalidated internal representation of local it.
CID
1322827 (#1 of 1): Wrapper object use after free (WRAPPER_ESCAPE)
25. use_after_free: Using invalidated internal representation of local it.
CID
1322826 (#1 of 1): Wrapper object use after free (WRAPPER_ESCAPE)
31. use_after_free: Using invalidated internal representation of local it.
CID
1322825 (#1 of 1): Wrapper object use after free (WRAPPER_ESCAPE)
31. use_after_free: Using invalidated internal representation of local it.
Signed-off-by: Sage Weil <sage@redhat.com>