Code review comment for lp:~tribaal/charms/trusty/rabbitmq-server/fix-le-ignore-min-cluster

Removed the introduced test, since I understand the entry barrier for new test is to be full matrix-testable, and this was not the case (not to mention it would need another matrix dimention - juju versions- to be effective).

The rest of the proposed changes are still valid and relevant (broken code is fixed).