Update git submodules

* Update docs/submodules/armband from branch 'stable/danube'
  - fuel: deploy: SFC scenarios: 4.8 krn, no vhost_net

    FIXME: Put patch in `upstream-backports` dir for now, so we don't
    have to edit other patches, to be moved to a more fit location later.

    Change-Id: Ia2e6e4800844dda0abc19347768a0927e0c3db9f
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 502b6c7..17bda8d 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 502b6c79b1a5787e76d2dc4291ef76075a1a06d5
+Subproject commit 17bda8d52856bece72bf2b446a30ffe4be8e2535