Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to f2c39570e2d1f602e72b169ebf796b93d162b3c4
  - Merge "Added AAF SSL certs related changes"
  - Added AAF SSL certs related changes

    Removed client certs from the docker image.
    These client certs will be mounted on the
    docker image using helm charts. This will
    allow helm users to manage AAF credentials
    using the keyfile available in SO OOM
    for CADI AAF feature.

    Issue-ID: SO-2451
    Signed-off-by: Ramesh Parthasarathy(rp6768)<ramesh.parthasarathy@att.com>
    Change-Id: I03efc6ad279f0eaf6773b0ddd42ab43fc053e424

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index ad6bbf0..f2c3957 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit ad6bbf0a02d28af81493f446760e200179405d78
+Subproject commit f2c39570e2d1f602e72b169ebf796b93d162b3c4