Update git submodules

* Update docs/submodules/moon from branch 'master'
  - add meta_data unittests for moon_manager

    Change-Id: I8338ce070b5537bedc1326182ba1f47fe41a1e08
    Signed-off-by: MohamedAssem <mmagraby.ext@orange.com>

diff --git a/docs/submodules/moon b/docs/submodules/moon
index 3a3072d..4f7c873 160000 (submodule)
--- a/docs/submodules/moon
+++ b/docs/submodules/moon
@@ -1 +1 @@
-Subproject commit 3a3072d2e1c4a17375405a6e7e8fd9adeab0c434
+Subproject commit 4f7c87335b1dcd947ae63ad5c756e20bdcf305c5