Update git submodules

Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 4baa51c89bd56894646458273a62bf3b2963b298
  - Update healthcheck-k8s script synopsis in vCPE manual

    This reflects changes made in regard of input parameters
    done in Change-Id: Ib6e2875f351f095bd64acd706a6060e169c54e79

    Also contains minor fix for 'namespace' and 'environment' vars
    usage which are unused otherwise.

    Change-Id: Ie479400dfa0d61c89a256d4aafb2c2d184f9b935
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
    Issue-ID: INT-1213