Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to f2d8bca52e0ff36f3b114bc557e9b88c8aad6098
  - Update demo artifacts version number to 1.6.0-SNAPSHOT
    
    Issue-ID: INT-1073
    Signed-off-by: Marco Platania <platania@research.att.com>
    Change-Id: Idbbebf9984f091c32347cdea2faf82ffa90918dd
    
diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index 33dbf9d..f2d8bca 160000
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit 33dbf9dd08434d3ffc50b3d9f4445b63cd178f2a
+Subproject commit f2d8bca52e0ff36f3b114bc557e9b88c8aad6098