Update git submodules

Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to feb93cdb3e2e842affe1a5de171c1242b44add70
  - Improve code testability

    A module is created with specific class methods
    to perform particular simulator services' lifecycle
    operations.

    Change-Id: I467360ab304a00f049bf53c3958e42f445f2d75b
    Issue-ID: INT-1577
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
  - Allow importing the script as module

    Improves testability (TBD)

    Change-Id: I0c4845f85d14b49b4702270ffad537a19c1c7df7
    Issue-ID: INT-1577
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
  - Rework input parameters handling

    Main input options were turned into subcommands
    for improved CLI user experience.

    Input parameters handling and validation logic was
    moved out of the code to argparse native facilities.

    Updated the doc around script usage details.

    Change-Id: Ifaa2a0e49f2a0b5b677020307dc74942c422bbe1
    Issue-ID: INT-1577
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>