Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 53c9acdac34c8ae726d61d22b88fbe711597ea37
  - Merge "handle multiple cvnfc configs"
  - handle multiple cvnfc configs

    - Handle multiple cvnfc configs with the same model uuid.
    - Update CvnfcConfigurationCustomization to a List from a Set

    Change-Id: I8c026510d813ebb6294a9cedd39d4d4b8f4b9dcf
    Issue-ID: SO-2056
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 5d391d3..53c9acd 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 5d391d37d6711b879dd39aaf764bb55630e895c4
+Subproject commit 53c9acdac34c8ae726d61d22b88fbe711597ea37