Update git submodules

* Update docs/submodules/armband from branch 'master'
  - p/fuel: Bring in Opendaylight support

    Change-Id: I3d3e729447a4d8e79fce486a7fc68f8f72675e3c
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 8d0731e..8bdc4f8 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 8d0731eecbb4c7f78e23c8a7e93004da7593afbe
+Subproject commit 8bdc4f87ac1e5a1630b028d33364e92232e991bd