Update git submodules

Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 5422700691d0c8c2f9f100b3d1599230b627de91
  - Run Maven directly

    Maven will be run directly from MassPnfSim module, not
    through wrapper shell script.

    Change-Id: Ib2936391ace3cbd31c3b5bba4ad6d776cfb890d8
    Issue-ID: INT-1577
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
  - Leverage internal shell runner in bootstrap mode

    Use native python modules for file operations

    Change-Id: I1ca505f9a891c722c2aace118536fa470bf50b35
    Issue-ID: INT-1577
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
  - Add internal method for shell runner in MassPnfSim module

    Since now if module is called in 'debug' mode shell script
    is run with trace.

    Change-Id: I7bddf6c0583c4b56d4a0c3b5eeb6a78af561891f
    Issue-ID: INT-1577
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
  - Fix ftp dir permission in sftp-server container

    Container entrypoint descendant script in atmoz/sftp:alpine image
    is changing mount binded ftp dir owner to 'root' which makes
    removing it by 'clean' action not possible hence adding o+w
    permission for it.

    Change-Id: I0d9339db80c4cd8e31c4368ac63741c531a626fa
    Issue-ID: INT-1577
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
  - Make the maven image build an independent step

    This improves testability as in CI the image build
    is done by relevant CI runner from provided POM file
    so building from script is redundant.

    Updated doc in regard on how to build the image locally.

    Change-Id: I7666bc638996c855fed139ee46fcc80379a02f3b
    Issue-ID: INT-1577
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>