Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 257e73dbba7f3e4da62f4d255f762b9bfb39915e
  - Merge "use async activity call in UpdateNetwork BB"
  - use async activity call in UpdateNetwork BB

    remove references to AIC in comments
    use async activity call in UpdateNetwork BB

    Change-Id: I46472571078ac335bc85c865fdd82964b68c0d75
    Issue-ID: SO-1583
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 10df209..257e73d 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 10df20909da905f93b4e1cda286fbbc7e6c77c84
+Subproject commit 257e73dbba7f3e4da62f4d255f762b9bfb39915e