Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to dfbc8abd0f1c151e34d07defbe0a5ff363fcf1f0
  - Sonar fix in MSOCommonBPMN

    Either log or rethrow this exception
    Remove this useless assignment to local variable "serviceInstance"
    Remove the declaration of thrown exception  which is a runtime exception
    Move the string literal on the left side of this string comparison

    Issue-ID: SO-1841
    Change-Id: I24cdd3682eddd2e5ceb7e961477a61457ef91ab2
    Signed-off-by: Parshad Patel <pars.patel@samsung.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index e536a10..dfbc8ab 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit e536a1035d0f224de32f76a1226c772b8f8d7c01
+Subproject commit dfbc8abd0f1c151e34d07defbe0a5ff363fcf1f0