Update git submodules

* Update docs/submodules/modeling/modelspec.git from branch 'master'
  to 0244d2481c4743edd123f5b278edb2e06e7004b5
  - Merge "Supplement nested Service"
  - Supplement nested Service

    Delete 3 repeated classes, supplement Atomic/Composite Service View
    attributes.

    Issue-ID: MODELING-104

    Change-Id: I5b7179b56235bcc37e4deb71c86862409b3a65ae

    Change-Id: I5b7179b56235bcc37e4deb71c86862409b3a65ae
    Signed-off-by: guochuyicmri <guochuyi@chinamobile.com>