'Host - compare content hosts packages' report: misleading error message when host1==host2
Description of problem:
When generating a 'Host - compare content hosts packages' report, when both hosts specified are the same host, generating fails (expected) and the following (misleading) error message is shown: "At least one of the hosts couldn't be found."
Steps to Reproduce:
#hammer report-template generate --inputs "Host 1 = <HOST1>,Host 2 = <HOST1>" --name 'Host - compare content hosts packages'
Failure, error message "At least one of the hosts couldn't be found."
Failure, different error message - e.g. "Host 1 and Host 2 are identical"