Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to b506a30ff5cf93a294995982ace7e1326764a713
  - Merge "Updated as per review comments"
  - Updated as per review comments

    This git review replaces https://gerrit.onap.org/r/#/c/78430/. As I had
    some issues updating the existing git review, I'm creating a new one.

    Issue-ID: SO-1391
    Change-Id: Ida3f94ad7e2249a30a99d67a071930323ba743b5
    Signed-off-by: Prema Bhatt <pb6115@att.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index c0c6449..b506a30 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit c0c6449fef2aed05eda93b462bf9b8939151b9aa
+Subproject commit b506a30ff5cf93a294995982ace7e1326764a713