Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - [baremetal] VCP VM base img: Switch URL to AWS S3

    Mirantis prebuilt base image for VCP VMs (used by salt.control on
    x86_64) has been moved to a new location on AWS S3.

    Change-Id: I9f4a858a1033c3c0a05cba0bd40a8ceac6075615
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 255742b98efd4ff499a6abc6eb491059fc268d43)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 115c12a..201900a 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 115c12a0546fb6e9db44cf2697a3acf3ea9955e0
+Subproject commit 201900ac05e9e9d7cff4984a1bf9d306eadcf14f