Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 2abd30fb57643fa07eb1a183c3525d559cb68237
  - Sonar fixes and improvements

    General fixes and improvements according to the Sonar analysis.
    -Fixed imports.
    -Removed unnecessary variables.
    -Added String constants.

    Issue-ID: SO-1992
    Signed-off-by: Robert Bogacki <r.bogacki@samsung.com>
    Change-Id: I8b77def931e703c8a73929ec09324823a91721e3

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index bb271cc..2abd30f 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit bb271cc82880d15dc9396170ac6ed95de22958a3
+Subproject commit 2abd30fb57643fa07eb1a183c3525d559cb68237