Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to a77552910fbfc5f0eb4771887839899e06e95065
  - Merge "Remove unused imports for client,logging classes"
  - Remove unused imports for client,logging classes

    Removal of unused imports for client,logging classes

    Issue-ID: SO-1490

    Change-Id: I812e94f97bcba046cdbf253563f9e1addc05972f
    Signed-off-by: Sindhuri.A <arcot.sindhuri@huawei.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index ff95f05..a775529 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit ff95f056d59bed7834f893cc9560372558c63d84
+Subproject commit a77552910fbfc5f0eb4771887839899e06e95065