Fixed failing unit test:

- copying and regarding the agent system properties as local configuration
  properties is not a good idea, as it would cause all kinds of weird 
  semantics like: if we start the agent with a property set to 'a', this 
  property will be stored and considered local. Now if we restart the agent
  with the same property set to 'b', it still will use the value 'a' as 
  this is what the local configuration said;
- the actual problem for wanting the system properties to be available was
  that the event listeners could get a map with all agent-related config-
  properties. This is something we could provide when sending the config-
  updated event without having to incorporate the system properties in our
  local configuration.



git-svn-id: https://svn.apache.org/repos/asf/ace/trunk@1586379 13f79535-47bb-0310-9956-ffa450edef68