Only notify restart after the config if enabled is true
Only notify restart after the config if enabled is true

The cookbook would break if node['activemq']['enabled'] was set to false w/o this
opscode-cookbooks/activemq,chef-cookbooks/activemq,pmccarthy/activemq,chef-cookbooks/activemq,pmccarthy/activemq,opscode-cookbooks/activemq