Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 2289007753fab6d836b83022300c7b13cb782f37
  - Add minimal Vagrant environment development documentation
    
    Issue-ID: ONAPARC-551
    Change-Id: I1a6f6b998df755734a9c32fbe86473a72a45aae0
    Signed-off-by: Pawel Wieczorek <p.wieczorek2@samsung.com>
    
diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index 1b681e3..2289007 160000
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit 1b681e360b8d083104026080c5517f237dc0945a
+Subproject commit 2289007753fab6d836b83022300c7b13cb782f37