Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 5f9eb004d38baa32597d164f9c2f40ed189ae69e
  - Merge "bump the versions for all the SO to 1.6.0"
  - bump the versions for all the SO to 1.6.0
    
    Issue-ID: SO-2519
    
    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: Id0993b244b0978375ff8476e4bf8ef79e1bb9e68
    
diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index b0f1369..5f9eb00 160000
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit b0f1369a3890c9592a1642502ad9a8cc14de2f1b
+Subproject commit 5f9eb004d38baa32597d164f9c2f40ed189ae69e