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Fix up Ranger Dockerfile and README.rst. Fix Dockerfile for tempest tests. Also remove unnecessary directories. Change-Id: I6d64755c6911919f8527e94a57113d886daf22bc
Fix up Ranger Dockerfile and README.rst. Fix Dockerfile for tempest tests. Also remove unnecessary directories. Change-Id: I6d64755c6911919f8527e94a57113d886daf22bc