Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to b521f501783fbe05bf8c5e08e7d42e8b3605d950
  - Merge "Sonar fixes in ManualTasks"
  - Sonar fixes in ManualTasks

    Code fixes in ManualTasks according to the Sonar analysis.
    -Removed unnecessary code.
    -Removed unused imports.
    -Removed unused variables.

    Issue-ID: SO-2100
    Signed-off-by: Robert Bogacki <r.bogacki@samsung.com>
    Change-Id: I79848456cc88b7f2cb812f7054bb6cec12b584c0

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index de03c49..b521f50 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit de03c49e2ee70d978789e08d7b7332403ad0f374
+Subproject commit b521f501783fbe05bf8c5e08e7d42e8b3605d950