Update git submodules

* Update docs/submodules/dmaap/datarouter.git from branch 'master'
  to 5972d3a80dcde06518f08ed5a21c5ae99fd6c170
  - Merge "Migrate dmaap-datarouter docs"
  - Migrate dmaap-datarouter docs

    Merging this will create
    https://onap-dmaap-datarouter.readthedocs.io
    This build will run in parallel
    to the current docs generation method
    until we are ready to cut over.

    Issue-ID: CIMAN-364
    Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
    Change-Id: I686662ac6f0add8b2539f46efad36d07c152fc76

diff --git a/docs/submodules/dmaap/datarouter.git b/docs/submodules/dmaap/datarouter.git
index 90fa2ce..5972d3a 160000 (submodule)
--- a/docs/submodules/dmaap/datarouter.git
+++ b/docs/submodules/dmaap/datarouter.git
@@ -1 +1 @@
-Subproject commit 90fa2ce92f0f41545a2b92dc3e2a9e29c326141a
+Subproject commit 5972d3a80dcde06518f08ed5a21c5ae99fd6c170