Installs and configures Logstash (http://logstash.net/) agent with the jar.
node["logstash"]["package_url"]- URL to monolithic logstash jar. Defaults to logstash-1.1.0-monolithic.jar.node['logstash']['install_path']- location where Logstash jar is installed. Default/usr/local/logstash.node['logstash']['config_path']- location where Logstash config files are stored. Default/etc/logstash.node['logstash']['log_path']- location where Logstash log files are written. Default/var/log/logstash.