Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 458cc8d407f27bc360f9d7c93164bae6b764947f
  - add vnfcInstanceGroup sequence
    Issue-ID: SO-1393
    
    Change-Id: Ife3b71dcfa543a693564779da44800f1dd8486e9
    Signed-off-by: zm330 <zhangminyj@chinamobile.com>
    
diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index be61cb6..458cc8d 160000
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit be61cb67952b83ebac6f16b84cd5d94ebd638bad
+Subproject commit 458cc8d407f27bc360f9d7c93164bae6b764947f