Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Return back glusterfs client state

    In order to set properly keystone fernet keys, apply glusterfs client
    state before second keystone server state. Also leave out user/group
    settings for glusterfs volume of nova instances as it will be set later
    by nova compute packages themselves.

    Change-Id: I069e37c67f08c51ed29f45cf6f92d4a00a1ac97b
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 23f9ef7..0224929 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 23f9ef727310a8ef449372313785241df6557559
+Subproject commit 0224929b3a87d0e0ec011311c46872e6142497cf