Update git submodules

* Update docs/submodules/armband from branch 'stable/euphrates'
  - u/fuel: Bump & rebase for MaaS DHCP fix

    While at it, adjust patch context for recently changed libvirtd
    socket group in salt-formula-libvirt.

    Change-Id: Ia2481b2c7efabdb0419999993961ee1f2fdf07fa
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 50708a7..9565a20 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 50708a7a564120a58b26e4285409c1abb2662d96
+Subproject commit 9565a20367bca5df4b4273e7c4057ea4260a9475