Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[opnfv-7.0.0] Fuel, Armband release"
  - [opnfv-7.0.0] Fuel, Armband release

    Change-Id: I961f1aa0fbf22b219acb33806a78af99ca889dcb
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index e9dceac..ea55fbd 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit e9dceac2ab513859e958a8e7160b8f6047691a95
+Subproject commit ea55fbde6214ffc9fd32b03870d968431072066c