Default generated workflow to use the same namenode and job tracker as Oozie

Currently when generating the workflow xml through the Maven plugin it explicitly calls out a separate NN and JT for actually executing the action separate from Oozie. Unless it is a best practice or common pattern it might be easier to simplify the default config to just use the same NN/JT as Oozie and remove the extra args.

      <job-tracker>${jobTracker}</job-tracker>
      <name-node>${nameNode}</name-node>
      <main-class&gt;org.example.ToolImplementation</main-class&gt;
      <arg>-D</arg>
      <arg>fs.default.name=hdfs://localhost</arg>
      <arg>-D</arg>
      <arg>mapred.job.tracker=localhost:8021</arg>