title: sonar.host.url not working with sonar-maven-plugin:2.7
body: <p>After upgrading my POMs to sonar-maven-plugin:2.7 the configuration does not work any more. My configuration in settings.xml is like this:</p>
  
  <pre><code>&lt;profile&gt;
    &lt;id&gt;sonar&lt;/id&gt;
    &lt;properties&gt;
      &lt;sonar.jdbc.url&gt;jdbc:postgresql://my.server:5432/sonar&lt;/sonar.jdbc.url&gt;
      &lt;sonar.jdbc.driverClassName&gt;org.postgresql.Driver&lt;/sonar.jdbc.driverClassName&gt;
      &lt;sonar.jdbc.username&gt;xxxxx&lt;/sonar.jdbc.username&gt;
      &lt;sonar.jdbc.password&gt;yyyyy&lt;/sonar.jdbc.password&gt;
      &lt;sonar.host.url&gt;http://my.server&lt;/sonar.host.url&gt;
    &lt;/properties&gt;
  &lt;/profile&gt;
  </code></pre>
  
  <p>The build is started with <strong>-Psonar</strong> of course. With version 2.6 everything is fine, with 2.7 I get </p>
  
  <pre><code>[INFO] --- sonar-maven-plugin:2.7:sonar (default-cli) @ myproject ---
  [INFO] User cache: C:\Users\me\.sonar\cache
  [ERROR] SonarQube server 'http://localhost:9000' can not be reached
  ...
  [ERROR] Failed to execute goal org.codehaus.mojo:sonar-maven-plugin:2.7:sonar (default-cli) on project myproject: Fail to download libraries from server: java.net.ConnectException: Connection refused: connect -&gt; [Help 1]
  </code></pre>
  
  <p>Starting the build with <strong>-X</strong> gives me the correct mojo configuration in both cases, especially the url is still correct in the log</p>
  
  <pre><code>[DEBUG]   (f) sonarHostURL = http://my.server
  </code></pre>
  
  <p>Even deleting the mentioned caching directory does not help.</p>
  
  <p>What can I do except of managing the plugin to version 2.6?</p>