On current SuSE Linux releases like SLES or OpenSuSE the Solr installer stops with the error message "Script requires the 'service' command".
This happens because before installation the installer checks if the used command "service" exists by its option "service --version".
The command line option "--version" doesn't exist for "service" on current SuSE Linux stable releases.
Since the command "service" is there and has an option "--help", this option can be used as additional fallback.
So in the pull request i extended the check with "service --help" as second check / fallback before printing this error and exiting.