Update git submodules

Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 34e5932d0db1d3aeeed962df176d3b635018e641
  - k8s: Silence download utilities

    This patch intends to make virtual environment creation logs more
    readable. Parameters were chosen in a way errors will still be shown the
    operator.

    This patch might also prove itself useful in other virtual environment
    creation tools such as 'devtool' [1] (unless maintainers insist on
    having full logs).

    [1] https://git.onap.org/integration/devtool

    Issue-ID: SECCOM-235
    Change-Id: I5e07b1b1ed37d36470c18ba0cfe653e40eff300b
    Signed-off-by: Pawel Wieczorek <p.wieczorek2@samsung.com>