Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 818f76a0173c5d6cef483425042b4f0651ee793b
  - EMS simulator extension for PNF SW Upgrade
    
    Change-Id: I3a8c706373f4004850c2403f4aee0d1f28aad464
    Issue-ID: INT-1208
    Signed-off-by: Enbo Wang <wangenbo@huawei.com>
    
diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index 5da05c5..818f76a 160000
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit 5da05c576855c0e9b0f7a3c5934da41b91615f33
+Subproject commit 818f76a0173c5d6cef483425042b4f0651ee793b