Update git submodules

* Update docs/submodules/dmaap/datarouter.git from branch 'master'
  to 4c5b91b5ce0901bf3044709fb2a172c2ae7763fc
  - Merge "More bug fix and refactoring"
  - More bug fix and refactoring
    
    Signed-off-by: efiacor <fiachra.corcoran@est.tech>
    Change-Id: I4fce4e73faa86573d0c716882bb014b9f83026ee
    Issue-ID: DMAAP-1284
    
1 file changed