Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 5211f2ed7a4bc239893c7a7db345858e094cfce8
  - Merge "removed unused imports lowered code smells"
  - removed unused imports lowered code smells
    
    Issue-ID: SO-2804
    Change-Id: Id2c98451cf522e8c4ffde592b12340e8c8bab577
    Signed-off-by: Rupinder <rupinsi1@in.ibm.com>
    
diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 723a9c4..5211f2e 160000
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 723a9c4ab5647f52f391e6aa329902feeda35370
+Subproject commit 5211f2ed7a4bc239893c7a7db345858e094cfce8