Refactor camel code

[brosenberg42]

Various aspects of how Workflow Manager uses Camel can be improved.

• Camel's default split and aggregate functionality can be used in multiple places instead of the custom CountBasedWfmAggregator. In places where custom split and aggregate functionality is required, it can be simplified by making better use of exchange properties Camel automatically sets.
• Each of the processors in DetectionResponseRouteBuilder get and store the same tracks in Redis. Change it so that the tracks are only retrieved and stored once for the entire route.
• TaskAggregationRouteBuilder just uses a single processor so it doesn't need to be its own route.