Revert "cron job to clean up rabbitmq connections"

Should be merged after oslo.messaging fix is ready

This reverts commit 211de91ab89b57dfda6a8d0a518ed16abd156ad5.

Related-Bug: #856764
Change-Id: Iea7dbd16a3da8c4ccd081833e5a4b01c936bd4a6
Merge "Revert "cron job to clean up rabbitmq connections""