Maven Jetty plugin daemon element not allowed here
<p>I am trying to configure a project's pom.xml file. I want it to start Jetty server in testing phase. In order to do it I should add "daemon" element to Jetty plugin as I did below, but IntelliJ warns me with "Element daemon is not allowed here." Can you please help me? What is the reason?</p>

<pre><code>&lt;build&gt;
    &lt;plugins&gt;
        &lt;plugin&gt;
            &lt;groupId&gt;org.eclipse.jetty&lt;/groupId&gt;
            &lt;artifactId&gt;jetty-maven-plugin&lt;/artifactId&gt;
            &lt;version&gt;9.2.11.v20150529&lt;/version&gt;
            &lt;configuration&gt;
                &lt;httpConnector&gt;
                    &lt;port&gt;8083&lt;/port&gt;
                &lt;/httpConnector&gt;
            &lt;/configuration&gt;
            &lt;executions&gt;
                &lt;execution&gt;
                    &lt;id&gt;start-jetty&lt;/id&gt;
                    &lt;phase&gt;pre-integration-test&lt;/phase&gt;
                    &lt;goals&gt;
                        &lt;goal&gt;run&lt;/goal&gt;
                    &lt;/goals&gt;
                    &lt;configuration&gt;
                        &lt;scanIntervalSeconds&gt;0&lt;/scanIntervalSeconds&gt;
                        &lt;daemon&gt;true&lt;/daemon&gt;
                    &lt;/configuration&gt;
                &lt;/execution&gt;
                &lt;execution&gt;
                    &lt;id&gt;stop-jetty&lt;/id&gt;
                    &lt;phase&gt;post-integration-test&lt;/phase&gt;
                    &lt;goals&gt;
                        &lt;goal&gt;stop&lt;/goal&gt;
                    &lt;/goals&gt;
                &lt;/execution&gt;
            &lt;/executions&gt;
        &lt;/plugin&gt;
    &lt;/plugins&gt;
&lt;/build&gt;
</code></pre>