Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 8dc31b7272fb451a4b88ae86187996ac3d739d06
  - Merge "Add Spring Component markup to rest validator"
  - Add Spring Component markup to rest validator

    Add Spring Component markup to rest validator classes.
    Do not invoke serviceInstanceDeleteValidator for macro deletes.

    Issue-ID: SO-2945
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I0eb501bccb016d5d5fed43c3f5d1bd39c7d4fd72

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index c94be5f..8dc31b7 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit c94be5f49f845bcbe115be749da2a7647329933c
+Subproject commit 8dc31b7272fb451a4b88ae86187996ac3d739d06