Update git submodules

* Update docs/submodules/openretriever from branch 'master'
  - Merge "Adding architecture options"
  - Adding architecture options

    As there are different architecture options
    to support VM and contaienr based VNF-s it
    is important to list these options and refer
    to them in the gap analyzis of the different
    projects.

    Change-Id: Iff027e96ba48616cbb6705c33cda2cd8086eb97e
    Signed-off-by: csatari <gergely.csatari@nokia.com>

diff --git a/docs/submodules/openretriever b/docs/submodules/openretriever
index 263f77e..ee1b670 160000 (submodule)
--- a/docs/submodules/openretriever
+++ b/docs/submodules/openretriever
@@ -1 +1 @@
-Subproject commit 263f77ed215f0719e116b389019ce4116aff27f2
+Subproject commit ee1b670eac051fcab76dda955b6b0aa5afb5161e