Update git submodules

* Update docs/submodules/dmaap/datarouter.git from branch 'master'
  to 7e8338ea2d68767d592d254c91e9e727509dce20
  - Bump DR version
    
    Signed-off-by: efiacor <fiachra.corcoran@est.tech>
    Change-Id: Ib9d3781edfa05dd9adeec66acaf556bb31cf8a14
    Issue-ID: DMAAP-1195
    
1 file changed