Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 6efe941220c936d37fb5f7687d92af2e782c11ff
  - Ensure Helm directory presence prior its first use

    It is required for plugins that are installed by copying sources to the
    Helm directory.

    Issue-ID: INT-1405
    Change-Id: I4ed2708f4af1d745b7e1ffc687ae9674682c374d
    Signed-off-by: Pawel Wieczorek <p.wieczorek2@samsung.com>

diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index 0d63138..6efe941 160000 (submodule)
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit 0d6313811530c5b6cead501eaecdbb351efb5b1d
+Subproject commit 6efe941220c936d37fb5f7687d92af2e782c11ff