code: public JenkinsServer createJob(String jobName, String jobXml) throws IOException {
          return createJob(null, jobName, jobXml, false);
      }
docs: Create a job on the server using the provided xml
  
  @param jobName name of the job to be created.
  @param jobXml the <code>config.xml</code> which should be used to create
  the job.
  @throws IOException in case of an error.