Update git submodules

Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 07adef3d6e19737962ad63b9eae36f18ccab02bb
  - k8s: Add "vagrant" user to "docker" group in virtual environment

    Node customization scripts do that for "ubuntu" user only (added by
    default on OpenStack images). Vagrant boxes use "vagrant" user [1]
    instead.

    [1] https://www.vagrantup.com/docs/boxes/base.html#quot-vagrant-quot-user

    Issue-ID: SECCOM-235
    Change-Id: Ic4f832aa9a37230503e3c5bd29f8ae5fcd3883db
    Signed-off-by: Pawel Wieczorek <p.wieczorek2@samsung.com>