Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to a739e13c22c6a402b4e429c943de648fe735f455
  - Merge "Replace type spec, define constant for literal"
  - Replace type spec, define constant for literal

    Replace type specification, define constant for String literal MsoNetworkAdapterAsyncImpl class

    Issue-ID: SO-1490

    Change-Id: Id4b7b8b3dc6d1aca1b76272f85beda9a6df7dfbb
    Signed-off-by: Sindhuri.A <arcot.sindhuri@huawei.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index be0998b..a739e13 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit be0998b1397f229c209a15fc2115f2d9ef10f1e8
+Subproject commit a739e13c22c6a402b4e429c943de648fe735f455