Adding Rally to OpenStack

Rally is a tool that simplifies testing, performance analysis and
benchmarking of all OpenStack clouds.

Our mission is to provide OpenStack ecosystem with framework and tool
that answer the question "How well OpenStack performs" and help developers
to improve OpenStack:

  - Rally tasks as a common language between QA/Dev/Ops and community
  - Simplify reproduction of performance/scale issues and races
  - Rally gate jobs that allows developers to
    work on performance/scale issues and races together in gates
  - Performance regression testing in gates and on scale
  - Automation of cloud performance validation

The Rally contributor community being made up of more then 135
developers from more then 36 companies.

Boris Pavlovic was selected as the PTL by Rally contributors according
to standard OpenStack community practices.

Our meetings are weekly, on IRC, and our road map is transparent and
managed via specs, feature requests, launchpad, Google drive and
other OpenStack community practices.

Change-Id: I53d42e5bff9217160703768e3d9643e4d1f9ecfa

reference/projects.yaml

@@ -872,3 +872,14 @@ Security:
     - repo: stackforge/anchor
     - repo: stackforge/bandit
     - repo: openstack/ossa
+
+Rally:
+  ptl: Boris Pavlovic (boris-42)
+  service: Benchmark as a Service
+  mission: >
+    To provide a framework for performance analysis and benchmarking of
+    individual OpenStack components as well as full production OpenStack
+    cloud deployments.
+  url: https://wiki.openstack.org/wiki/Rally
+  projects:
+    - repo: openstack/rally