NOTE: A copy of the org.opennms.web.alarm.Alarm class is included here
to provide a severity mapping for openNMS alarms.
This is done because at the time of writing OpenNMS did not generate
a webapp jar which could be accessed through MAVEN.
If the webapp is made into a maven package then this can be replaced with
a reference in the pom file.
Alternatively ( and better ) OpenNMS could include the severity
mapping centrally in the OnmsAlarm model.