Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to d649392f915fe669d61ed766f632f2cf1efb130f
  - Fix image push failures

    Latest com.spotify:docker-maven-plugin has
    a bug preventing images to be pushed to the
    private registries.
    Latest bug-free version is 1.0.0 so revert to it.

    Change-Id: Ibe8f733a2e6b059203fa5dcca297ad35e7e1fe42
    Issue-ID: INT-879
    Signed-off-by: Dmitry Puzikov <dmitry.puzikov@tieto.com>

diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index f6d021b..d649392 160000 (submodule)
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit f6d021b2738d0bc2e04feab320a6321c7adced60
+Subproject commit d649392f915fe669d61ed766f632f2cf1efb130f