Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[scenario] Factor out common nodes, states"
  - [scenario] Factor out common nodes, states

    Make the bulk of scenario files static again by shifting out all
    common virtual nodes (mas01) and states (virtual_init, maas etc.)
    to default.yaml(.j2).

    This allows us to parse scenario-specific data during first j2
    expansion, preparing for the new Pharos installer adapter that
    relies on `conf.virtual.nodes.control` length to construct the
    proper list of MaaS node definitions (kvm{01,02,03} vs {ctl01,gtw01}).

    Change-Id: I666ab5bd6bb2a42f98646af51950f6b9fffa0e8b
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 8cc4a61..381d952 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 8cc4a610b6769b57f41801f2885fe3044ee428c2
+Subproject commit 381d952bf505cda14088ac39f9a53229f70b8ef7