Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 5ececa1257c70420d398a903db267e14b14b3a6a
  - Merge "Replace collections.size with isEmpty for better performance"
  - Replace collections.size with isEmpty for better performance

    Replace collections.size with isEmpty for better performance asdc-controller

    Issue-ID: SO-2187

    Signed-off-by: sindhu3672 <arcot.sindhuri@huawei.com>
    Change-Id: Ie8adc3a149a583fe66c771ee70ae95055a229f83

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 7eb9564..5ececa1 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 7eb95648f98d7cfc551a0db144a8cfc5d447ee25
+Subproject commit 5ececa1257c70420d398a903db267e14b14b3a6a