Update git submodules

* Update docs/submodules/dmaap/datarouter.git from branch 'master'
  to 90fa2ce92f0f41545a2b92dc3e2a9e29c326141a
  - Release DR 2.1.4 image
    
    Signed-off-by: efiacor <fiachra.corcoran@est.tech>
    Change-Id: I107483a989a7bce8771b642383b5593baf63510c
    Issue-ID: DMAAP-1195
    
1 file changed