Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to f8842dbd4065e0b90d4ed0d4af9e4cc72ca218dd
  - Merge "Cleaned up Sonar issues in AuditStackServiceData"
  - Cleaned up Sonar issues in AuditStackServiceData

    Removed unnecessary imports.
    Removed unnecessary cast to "String".

    Change-Id: I8b14b0f53860edb656b38914941c44003a625037
    Issue-ID: SO-1537
    Signed-off-by: Robert Bogacki <r.bogacki@samsung.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 20a24c8..f8842db 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 20a24c8e780890d4e63b281e5de16080d322bf17
+Subproject commit f8842dbd4065e0b90d4ed0d4af9e4cc72ca218dd