cephadm-adoption-corpus: add stud-mon.tgz

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

diff --git a/cephadm-adoption-corpus b/cephadm-adoption-corpus
index 80c2e76549e35651ac7d7ee17e6badaee42dc866..87b61cd97e4e8864913058e13cb192c28d359eee 160000 (submodule)
--- a/cephadm-adoption-corpus
+++ b/cephadm-adoption-corpus
@@ -1 +1 @@
-Subproject commit 80c2e76549e35651ac7d7ee17e6badaee42dc866
+Subproject commit 87b61cd97e4e8864913058e13cb192c28d359eee