Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - reclass: Fix all remaining yamllint warning

    Change-Id: I1e0e1ba291dd4d5af578d89274f3655ee784f64e
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit c11eb920a3570ed22b252bbb8eecfb5231f5db1a)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index c7e4243..e9f6d0c 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit c7e4243cb9ef6111bab4c5421ad7ec09a69e3ce5
+Subproject commit e9f6d0cfeb8dd944e2cc8ce3b1575cc33cdd6f29