I just installed Acquia Dev Desktop Control Panel and started up and get the error: Your site was unable to contact the Apache Solr server. Default environment url is: http://localhost:8983/solr. I know that Solr is an Apache search platform based on Lucene which is Java and not PHP. Is this something I should install outside of the Acquia Control Panel and set it to listen on port 8983. I have Tomcat installed on my system so I could certainly do that but is it essential to my Acquia development environment.