Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 4e8dc31bc33bb44cb488a4c2b7d9c173db4f3a3e
  - Merge "Replace type specification,Remove unused import"
  - Replace type specification,Remove unused import

    Replace type specification,Remove unused import sniro beans

    Issue-ID: SO-1490

    Change-Id: Ic7d96ccc79db3cee839cc230dd69121ab6796e88
    Signed-off-by: Sindhuri.A <arcot.sindhuri@huawei.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 81d98b8..4e8dc31 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 81d98b8aeb793ace664a30283df03821bea1930a
+Subproject commit 4e8dc31bc33bb44cb488a4c2b7d9c173db4f3a3e