java_agent recipe doesn't actually create newrelic user

[iancward]

If a user wants to use just the java APM agent but not the server agent, and leaves the node['newrelic']['java_agent']['app_user'] attribute set at the default newrelic user, the chef run will fail because the user doesn't exist.

It would be nice if this cookbook created the user if it didn't exist; however, it looks like the user resource doesn't have a create_if_missing action.

[acondrat]

Same applies for Ruby agent.