Fix PRD-2405. Change get element qpid on get rabbit

Fix to problems:
 * key error in parse_generated for RHEL installation
 * syntax error in mixin_verify_body_contents

Change-Id: Ie82ace6600f6d4bcb0d7a9e348dd67b515208978
Merge "Fix PRD-2405. Change get element qpid on get rabbit"