Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to b6ffa5d514cda289b1052b405067a04b2819c43e
  - Merge "Major Sonar fixes"
  - Major Sonar fixes

    Major Sonar fixes in different classes:
    -Removed unnecessary code.
    -Removed unused variables.
    -Removed unnecessary imports.
    -Simplified diamond operators.
    -Improved String comparisons in equals.

    Issue-ID: SO-2102
    Signed-off-by: Robert Bogacki <r.bogacki@samsung.com>
    Change-Id: I279c63f8e7161d6e33d5d6a28b938c0c64e90f1f

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index d8e9031..b6ffa5d 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit d8e90311006bcb53592c48c246aa2479f807b5ae
+Subproject commit b6ffa5d514cda289b1052b405067a04b2819c43e