Update git submodules

* Update docs/submodules/integration.git from branch 'dublin'
  to 32957a18f29e0b9e1be71d823bc9735546c1c2b6
  - Update CM use case doc

    Signed-off-by: Yang Xu <yang.xu@futurewei.com>
    Issue-ID: INT-1104
    Change-Id: I991301886aec371f554eb0f076a9360910ee24d9

diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index 81cf8d9..32957a1 160000 (submodule)
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit 81cf8d939da110f86d3d7085fd289c08ee9da678
+Subproject commit 32957a18f29e0b9e1be71d823bc9735546c1c2b6