Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 13de1c66eb55333e18d552ccd4fdde30dd06ad02
  - Setup Python linters in tox

    This adds Python linting setup that'll be triggered
    by relevant CI job for any uploaded python script review.

    Change-Id: I957156e281e97a05651e806f6418a7c450e20b43
    Issue-ID: INT-1427
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>

diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index a58b0b4..13de1c6 160000 (submodule)
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit a58b0b438cf34abbb74bbc34635a17ffd02088c9
+Subproject commit 13de1c66eb55333e18d552ccd4fdde30dd06ad02