Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to b688e6267a5f3557af5ed366d4eee83ab884a854
  - Merge "Remove comment lines in integration_override"
  - Remove comment lines in integration_override

    The lines commented out in commit 87c3c73130a15f3084a3576fad8fc0b941afb467
    apparently cause issues after translation by HEAT.  Removing them
    completely for now.

    Change-Id: I14bf726acccc88f9a855970248758e476f5149eb
    Issue-ID: INT-1014
    Signed-off-by: Gary Wu <gary.i.wu@huawei.com>

diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index 3520d59..b688e62 160000 (submodule)
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit 3520d59f179250c9ae9fa044bc636fadd46a6678
+Subproject commit b688e6267a5f3557af5ed366d4eee83ab884a854