Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to f43e4eacc8920a753852c9e6e8233ed6bcd6651d
  - Merge "Shift string literal to left side of equals(avoid null pointer ex)"
  - Shift string literal to left side of equals(avoid null pointer ex)

    Avoid null pointer exception mso-openstack-adapters classes

    Issue-ID: SO-2187

    Signed-off-by: sindhu3672 <arcot.sindhuri@huawei.com>
    Change-Id: Ie7099318a79162aed26ec3a8e4a013cece367736

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 6979549..f43e4ea 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 6979549db55e84227f4efde58ee58159c8219099
+Subproject commit f43e4eacc8920a753852c9e6e8233ed6bcd6651d