Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 5128f152409017604d97b1e2f711a77a4c3acdf3
  - Merge "Fix delete of generic neutron network"
  - Fix delete of generic neutron network

    Delete of Generic Neutron network was not working.
    Logic checking for association with vf-module appears to
    have been reversed.

    Change-Id: If541c1133322f75c70f86cd77d8bccd88b94f356
    Issue-ID: SO-2082
    Signed-off-by: Eric Multanen <eric.w.multanen@intel.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 8813ba7..5128f15 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 8813ba72c340e45f586b71c9ee12382cdecec91f
+Subproject commit 5128f152409017604d97b1e2f711a77a4c3acdf3