Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 3e04b724468731c53f9d3df599c91e7120dccd6c
  - Merge "Add String constant for duplicate literals"
  - Add String constant for duplicate literals

    Added String constant for duplicate literals MsoVnfAdapterImpl class

    Issue-ID: SO-1490

    Change-Id: I1dba65ee9f7c5a01f34f0ca51191325eb6805ef5
    Signed-off-by: Sindhuri.A <arcot.sindhuri@huawei.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 02796dd..3e04b72 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 02796dd5d5e4e6068d3e3067b9e86a590fa634bb
+Subproject commit 3e04b724468731c53f9d3df599c91e7120dccd6c