Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 9f4721c6858cd3dc1b94b22febd2fe5e38f8de3c
  - Merge "WorkflowAction, traverseNetworkCollection refactoring stage 3"
  - WorkflowAction, traverseNetworkCollection refactoring stage 3

    - invert if's;
    - extract one logical function;

    Issue-ID: SO-2634
    Signed-off-by: Krzysztof Gajewski <krzysztof.gajewski@nokia.com>
    Change-Id: I13ae784088fdbe1f4b6b16fc439d70597c1fe811

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index cf5b749..9f4721c 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit cf5b7493eb7dffdeb211af056ce8459ede89292a
+Subproject commit 9f4721c6858cd3dc1b94b22febd2fe5e38f8de3c