Update git submodules

* Update docs/submodules/moon from branch 'master'
  - Delete some Oslo modules and update the cache

    Change-Id: I0888f40218a5513ef45af5267785acd8f8fddfd8

diff --git a/docs/submodules/moon b/docs/submodules/moon
index 2d4ede4..1bee8fe 160000 (submodule)
--- a/docs/submodules/moon
+++ b/docs/submodules/moon
@@ -1 +1 @@
-Subproject commit 2d4ede421277b1c60974f593ba82684988784e1e
+Subproject commit 1bee8fef0c764cda4e547d11bd3567e5ac8820a7