Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 921c7baee8511eac0aa972139df3a238ac56299b
  - Merge "Update policy casablanca maint artifacts"
  - Update policy casablanca maint artifacts
    
    For the 2nd Casablanca Maintenance release, these artifacts are
    for the policy team fixes.
    
    Change-Id: I7d970bf035353e2c06944a22c244f3fffdc991b1
    Issue-ID: POLICY-1607
    Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>
    
1 file changed