Update git submodules

Update git submodules

* Update docs/submodules/modeling/modelspec.git from branch 'master'
  to c16ffac87585a881393e269c3592e4a295a78a75
  - Update to Common

    Finalized a draft root proposal and created a shell location package
    with a place class referenced in the root proposal.  There are a number
    of 'temporary' duplicate classes in the root proposal intentionally left
    in the diagrams package.   These will be deleted and replaced with the
    correct classes from various submodels when appropriate.

    Issue-ID: MODELING-104

    Change-Id: If837a150c2a13fcae6742cae1228238e19241243
    Signed-off-by: Kevin Scaggs <ks0567@att.com>