I think this package is now part of RHEL itself, but some work from EPEL is missing.
I only found this: 1568379 – collectd needs rebuild for el7.5
My guess: tools have been merged into the lib package (checkout this https://buildlogs.centos.org/c7.1804.00.x86_64/librabbitmq/20180411043234/0.8.0-2.el7.x86_64/librabbitmq-0.8.0-2.el7.x86_64.rpm)
Package info: https://apps.fedoraproject.org/packages/librabbitmq-tools/
@filippo_carletti is already working on it!