Update git submodules

* Update docs/submodules/modeling/modelspec.git from branch 'master'
  to 03991d6387401327cf17b3389521262ec2c89dea
  - Changes to Common, Nf, and Vnf
    
    Issue-ID: MODELING-104
    
    Change-Id: I1ca39153aa452d25a206400efe5263e31d7fe78e
    Signed-off-by: jjewitt58 <jessie.jewitt@oamtechnologies.com>
1 file changed