title: In solr dih import two double in one location
body: <p>What I have now is the two double filds: </p>
  
  <pre><code>&lt;field name="x_geo_x_coordinate" type="double" indexed="true" stored="true" default="0"/&gt; 
  &lt;field name="x_geo_y_coordinate" type="double" indexed="true" stored="true" default="0"/&gt;
  </code></pre>
  
  <p>and what I want: the 2 double value in one location field: </p>
  
  <pre><code>&lt;field name="x_geo" type="location" indexed="true" stored="true" default="0.0,0.0"/&gt;
  </code></pre>
  
  <p>What I tried so far and does't work: </p>
  
  <pre><code>&lt;copyField source="*_coordinate" dest="x_geo"/&gt;
  &lt;copyField source="x_geo_str" dest="x_geo"/&gt;
  </code></pre>
  
  <p>Any simple solution? Thanks in advance!</p>