Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 57112781f7d026580f82f82ec61825168bb42a7d
  - Merge "Removed subscriber variable that was not actually used in any test (to remove static analyzer warning)"
  - Removed subscriber variable that was not actually
    used in any test (to remove static analyzer
    warning)

    Issue-ID: SO-1841
    Signed-off-by: Oleksandr Moliavko <o.moliavko@samsung.com>
    Change-Id: I7665c3dcb85d5c0d80c0448e6ad5ff1ece5a0bef

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index c2b3b43..5711278 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit c2b3b43ce4b51018da9013edfb59d088ac6069e0
+Subproject commit 57112781f7d026580f82f82ec61825168bb42a7d