Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 86e0740ff36b97ba98f1ed02f34bfb23d1b96262
  - Latest changes to pnf simulator
    - replace cpp bindings by python
    - remove docker spotify plugin (no longer supported)
    - create own image for netopeer (with all packages installed upfront)
    Issue-ID: INT-1372

    Signed-off-by: wsliwka <wojciech.sliwka@nokia.com>
    Change-Id: I983c0eddf12fa589fbf3ad1ffbab2b36929c9ef0

diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index 6f2913b..86e0740 160000 (submodule)
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit 6f2913b0129ea48becccfd55eeb93cbcb991f651
+Subproject commit 86e0740ff36b97ba98f1ed02f34bfb23d1b96262