Update git submodules

* Update docs/submodules/moon from branch 'master'
  - moon_db python unit test init

    Change-Id: Iba8deac5177c3499c89d6742874d3daf9fe3289a
    Signed-off-by: WuKong <rebirthmonkey@gmail.com>

diff --git a/docs/submodules/moon b/docs/submodules/moon
index 65c16b6..f8008b2 160000 (submodule)
--- a/docs/submodules/moon
+++ b/docs/submodules/moon
@@ -1 +1 @@
-Subproject commit 65c16b6c8e807dffef0a724ce203e1ffd5ca6cc7
+Subproject commit f8008b22aab089a1d925da390e45b67d2f65d6cb