Update git submodules

* Update docs/submodules/moon from branch 'stable/euphrates'
  - Various corrections

    Adjusted structure and enabled referencing.

    Change-Id: I23a8afd08ebb013d772314b450497c17bfdfc4fc
    Signed-off-by: Sofia Wallin <sofia.wallin@ericsson.com>
    (cherry picked from commit e493f6692072574d339972f0db3adb8270bdeccd)

diff --git a/docs/submodules/moon b/docs/submodules/moon
index 471fcaa..29cdab6 160000 (submodule)
--- a/docs/submodules/moon
+++ b/docs/submodules/moon
@@ -1 +1 @@
-Subproject commit 471fcaa69ee8e630af7d38ace0403c5e993cff04
+Subproject commit 29cdab640fea67115032a34ce9a5a109ee44b6ee