Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "states: Split virtual_control_plane from maas"
  - states: Split virtual_control_plane from maas

    We should eventually also support baremetal deploys without a
    virtualized control plane (VCP), so decouple MaaS provisioning
    from VCP provisioning.

    While at it, move "wait_for" bash function from maas state to
    common library file, lib.sh.

    Change-Id: I32c33135655cb6aceae901a5f92b51265a8c84b4
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index bd0259e..ca4e854 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit bd0259e7bb5f045a1ba7958d79039848d062aad1
+Subproject commit ca4e854f1b0eb6bfb35aa349e7d74abdd71128df