Add new project logaas

Logaas is Logging as a Service for OpenStack
Goal of this project is to unify process of how we are dealing with
logs in OpenStack based on logstash/syslog and other backends, and
as well present OpenStack API for querying logs.

Change-Id: I4d115794d50e58f9277506425ba8600c67583afe
Merge "Add new project logaas"