ceph-object-corpus: drop coll_t 'foo' and 'bar'

We don't care if these parse in real clusters, they are no longer legal,
and we still want to test other old coll_t instances.. so just drop these
ones.

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/ceph-object-corpus b/ceph-object-corpus
index da43eb119558fb46d86e62f3b82d5ca63546f69e..7bd9bbe235c59527dd1ab192fed21944da686d20 160000 (submodule)
--- a/ceph-object-corpus
+++ b/ceph-object-corpus
@@ -1 +1 @@
-Subproject commit da43eb119558fb46d86e62f3b82d5ca63546f69e
+Subproject commit 7bd9bbe235c59527dd1ab192fed21944da686d20