Update git submodules

* Update docs/submodules/armband from branch 'stable/euphrates'
  - u/fuel: Bump for salt-formula-neutron fixup

    Change-Id: Id9859eeb526822355948833ca1ce067594931321
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 2fafa3657fe0c48879d700983ed8c3abce9e42be)

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 992e94d..9050324 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 992e94ddcc94eb7222ed0dcf9e2fac5a2c15b464
+Subproject commit 90503244803cc01bbbe4e4898998eaff3ebb3b32