Update git submodules

* Update docs/submodules/portal.git from branch 'master'
  to 53e7159c86e9c71b84ab570e1728a99dbfe4910a
  - Merge "Transport DTO up"
  - Transport DTO up
    
    Transport DTO up and some minor fixes
    
    Issue-ID: PORTAL-710
    Signed-off-by: Dominik Mizyn <d.mizyn@samsung.com>
    Change-Id: I867164cb1f562d394f13efa6b3a9d27fb903755e
    
1 file changed