Update git submodules

Update git submodules

* Update docs/submodules/ccsdk/parent.git from branch 'elalto'
  to a38455a3d6187febbfff0018a5c30fac64fc14d0
  - Roll to next snapshot

    Roll to next snapshot version

    Change-Id: Ib21615064056ef46b6f13fcfd564e350200f8597
    Issue-ID: CCSDK-1701
    Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>
  - Release version 1.4.2 POM

    Release version 1.4.2 of parent poms

    Change-Id: I48b3e2a99163d782f9016e409e534590de726629
    Issue-ID: CCSDK-1701
    Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>
  - Roll version for El Alto release

    Roll version in elalto branch to next El Alto version (1.4.2-SNAPSHOT)

    Change-Id: Ibf8f1a5f659556817ae15196c994df2a3430ab66
    Issue-ID: CCSDK-1701
    Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>