Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 5f4c4f3f3215eb136f9c4f84f51dc8fcd5fe0353
  - General Sonar fixes and improvements

    General fixes and improvements according to the Sonar analysis.
    -Fixed imports.
    -Removed unnecessary variables.
    -Protect utility static classes with private constructor.
    -Removed unnecessary exceptions.

    Issue-ID: SO-1992
    Signed-off-by: Robert Bogacki <r.bogacki@samsung.com>
    Change-Id: Ib0011d730f86e0e1a25d4cf1080a61b2fbb335ae

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 464775c..5f4c4f3 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 464775cb4d3e2eb14b25ebba627cae1b81de62ac
+Subproject commit 5f4c4f3f3215eb136f9c4f84f51dc8fcd5fe0353