Fixes ActiveMQ Service Startup

Previously, ActiveMQ was in a "down" state after the successful
completion of a puppet agent run.  This is because the service was
not being restarted after modifying the necessary configuration
files.  By adding a notify => activemq service to config
files, the service is now being restarted by puppet.
Merge pull request #144 from danehans/activemq_fix

Fixes ActiveMQ Service Startup