ADD venus for kolla-ansible

This project [1] can provide a one-stop solution to log collection,
cleaning, indexing, analysis, alarm, visualization, report generation
and other needs, which involves helping operator or maintainer to
quickly solve retrieve problems, grasp the operational health of the
platform, and improve the level of platform management.

[1] https://wiki.openstack.org/wiki/Venus

Change-Id: If3562bbed6181002b76831bab54f863041c5a885