Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to d71a9c0da606fb8bb3fe39de438562a9dd2304a5
  - Merge "Added null check for httpResponse to prevent crash at throwing exception"
  - Added null check for httpResponse to prevent crash
    at throwing exception

    Issue-ID: SO-1841
    Signed-off-by: Oleksandr Moliavko <o.moliavko@samsung.com>
    Change-Id: Iffbaaddea9c9bb1609ce2e0755f6f3ca49e0ad31

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 4ec2459..d71a9c0 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 4ec24592f5dfb1449f35ab48d3100a428a4f5e9e
+Subproject commit d71a9c0da606fb8bb3fe39de438562a9dd2304a5