Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to adf7790712eb164aa6bc6e91f5d19cdb39bd0f0f
  - Merge "Change string literal left side-avoid null pointer ex"
  - Change string literal left side-avoid null pointer ex

    Change string literal left side so.adapters.vnfmadapter WebSecurityConfigImpl class

    Issue-ID: SO-2187

    Signed-off-by: sindhu3672 <arcot.sindhuri@huawei.com>
    Change-Id: I8ba57bd9c3c548a35b90d9324f1d214985c3c539

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 2b58358..adf7790 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 2b583582a027a368c552dc956243e71a49f33922
+Subproject commit adf7790712eb164aa6bc6e91f5d19cdb39bd0f0f