Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - [baremetal] maas state: Wait for all nodes online

    After MaaS reports baremetal provisioning finished successfully,
    check that all nodes are online before attempting a `sync_all`.

    Change-Id: I6ba4b3e4ba5b5258ace4da8c39e0fc77354885e3
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit b9918f1f8df52c52cd2ab76eec3b540b37789e55)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 096df52..fd4b2e7 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 096df52c4f1292a92c50e606f28146d1c2ca16db
+Subproject commit fd4b2e706e0403528bcb0d56e4339952eb50fcb2