Update git submodules

* Update docs/submodules/policy/distribution.git from branch 'master'
  to d784d71afce52687442c4753643280eae7cfe2ac
  - Bump distribution to 2.2.0
    
    Due to dublin branch.
    
    Issue-ID: POLICY-1747
    Change-Id: I889d3c5276a070404eeba86d99ca82852d2645e5
    Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>
    
1 file changed