Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to f9c6fa669c914aaee3dee13f747c077ed6c17302
  - Merge "Fix NoClassDefFoundError for ServicePluginFactory"
  - Fix NoClassDefFoundError for ServicePluginFactory

    Fix NoClassDefFoundError for ServicePluginFactory
    appears when we run SO via docker-compose command

    Change-Id: I8ba5963edf28f81d948f71a9d698541f682de908
    Issue-ID: SO-2206
    Signed-off-by: sarada prasad sahoo <sarada.prasad.sahoo@huawei.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 23f5c77..f9c6fa6 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 23f5c77f144d8f722083a99603975d4f7ca1926c
+Subproject commit f9c6fa669c914aaee3dee13f747c077ed6c17302