Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to d6a26f001eb691c6e8b7269e9045980ca3a57e9b
  - Merge "Set WorkflowException on BPMN WF error"
  - Set WorkflowException on BPMN WF error

    WorkflowException needs to be set when execution of a custom workflows fails due to an error from BPMN

    Issue-ID: SO-2369
    Signed-off-by: Kuleshov, Elena <evn@att.com>
    Change-Id: Ie5ab66105681588000693fdbb3ca89310aee8a7c

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 0f5d4b5..d6a26f0 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 0f5d4b5e7df6d80684d612e27ce32f0cae6f6b6c
+Subproject commit d6a26f001eb691c6e8b7269e9045980ca3a57e9b