title: 'parent.relativePath' points at my com.mycompany:MyProject instead of org.apache:apache - Why?
body: <p>What is true is that Solr project directory is inside MyProject parent directory (but there's no module or any maven relationship between the 2, just FS convenience). Do I have to place it out?</p>
  
  <pre><code>$ mvn -DskipTests clean install
  [INFO] Scanning for projects...
  [WARNING] 
  [WARNING] Some problems were encountered while building the effective model for org.apache.lucene:lucene-solr-grandparent:pom:3.1-SNAPSHOT
  [WARNING] 'parent.relativePath' points at com.mycompany:MyProject instead of org.apache:apache, please verify your project structure @ line 23, column 11
  [WARNING] 
  [WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
  [WARNING] 
  [WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
  [WARNING] 
  </code></pre>
  
  <p>from <code>pom.xml</code>:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;parent&gt;
      &lt;groupId&gt;org.apache&lt;/groupId&gt;
      &lt;artifactId&gt;apache&lt;/artifactId&gt;
      &lt;version&gt;8&lt;/version&gt;
    &lt;/parent&gt;
  
  $ pwd
  /Users/simpatico/ws/MyProjectBaseDir/solr
  </code></pre>