Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Merge "[baremetal] Retry keystone.client state on failure" into stable/euphrates
  - [baremetal] Retry keystone.client state on failure

    JIRA: FUEL-306

    Change-Id: I648545890c1f7dc59176beac1a0593aed54079cb
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    Signed-off-by: Delia Popescu <delia.popescu@enea.com>
    (cherry picked from commit dcbc90f89292bf5070e8e0b54a760755b8206346)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index a41859d..b7166b8 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit a41859d63847556066eca1d6d3e27794d9f5d2a5
+Subproject commit b7166b84b24bcccdfcd46eb485249ef17b953b81