Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 42b399ea943940ef1e37c267a9aea03b5f01f2d0
  - Merge "Add SO Update Check if SDC activities deployment end point for custom worlflows is alive"
  - Add SO Update Check if SDC activities deployment end point for custom worlflows is alive

    Make changes to verify if SDC activities deployment
    end point(mso.asdc.config.activity.endpoint)  for custom worlflows is alive
    Issue-ID: SO-2294
    Signed-off-by: Bonkur, Venkat (vb8416) <vb8416@att.com>
    Change-Id: Iff916a33b403d507a383cebf8d668bb5cbf9fb55

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index d9a8e5a..42b399e 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit d9a8e5a77e5c7857225704d81189583d78c26d2f
+Subproject commit 42b399ea943940ef1e37c267a9aea03b5f01f2d0