Update git submodules

* Update docs/submodules/armband from branch 'master'
  - u/fuel: Bump & rebase for OVS-DPDK vxlan

    Fix patch context after [1] was pushed upstream.
    Update copyright year in Fuel patches (and template).

    [1] https://github.com/salt-formulas/salt-formula-salt/commit/4c7cd2d

    Change-Id: I41755993cfc2dac89e8060768f01d58c5d2e5767
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 709976c..b8a5f25 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 709976cdb4cec03c51cefcb04cef4cc160a7508b
+Subproject commit b8a5f2593d1c9a920e41bedec9ee3467200bedea