Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 5d391d37d6711b879dd39aaf764bb55630e895c4
  - Merge "add rollback ext system error source"
  - add rollback ext system error source

    Added rollbackExtSystemErrorSource column and updated GET
    orchestrationRequests response
    Added missing columns from requestDb to schema.sql

    Change-Id: I2380f08b9bb1c86922e8faea70454df722c0873a
    Issue-ID: SO-2054
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index d178938..5d391d3 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit d178938c12d54bc17c3c674b29d4c464f059de33
+Subproject commit 5d391d37d6711b879dd39aaf764bb55630e895c4