Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to e44ce517546de531b5a74b7102a4d449a902f190
  - Merge "Fix request input parsing if default value null"
  - Fix request input parsing if default value null

    Fix request input parsing if default value null.

    Change-Id: I5d3e2e55d630271f93773eb7c634f50af4197fb0
    Issue-ID: SO-1744
    Signed-off-by: subhash kumar singh <subhash.kumar.singh@huawei.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 7da2cba..e44ce51 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 7da2cbad2954e8cf46971f168ab867086b1e026a
+Subproject commit e44ce517546de531b5a74b7102a4d449a902f190