Update git submodules

* Update docs/submodules/armband from branch 'stable/euphrates'
  - u/fuel: Bump & rebase for keystone.client retry

    Change-Id: I1a1d91af5c7dc92307ccd7a52e97cc95c70149f0
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit adbf9f707a702eff262d8437a68bc6c04e12d786)

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 59e3838..fc7fb36 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 59e383882c027befc50dbd6ef9d59a7e26815183
+Subproject commit fc7fb36396fe650d0f39c6bfb132e95495d84d7d