AntRunner does not accept Argument Processor

Ant provides [a feature to process non-standard command lines](https://ant.apache.org/manual/argumentprocessor.html). The `AntRunner` does not invoke this facility. It relies on implementations of [`ArgumentProcessor`](https://ant.apache.org/manual/api/org/apache/tools/ant/ArgumentProcessor.html). This feature would be helpful to produce semantically strong invocations, rather than difficult to read property sets.