Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[MaaS] Add maas.machines.set_storage_layout sls"
  - [MaaS] Add maas.machines.set_storage_layout sls

    On cmp nodes, allocate only 30GB (fixed for now) for / partition.
    The rest of the disk(s) can later be allocated via salt-formula-linux.

    JIRA: FUEL-330

    Change-Id: Ie11c78791e60801719cd33475ff91fc003df5ffa
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 724890e..d47339c 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 724890ecec8bb467947b3dcb20a59962273ffbcb
+Subproject commit d47339ccf86f2f3a5ddcca57339ad4e43228d556