title: multiple search index spring data solr showcase
body: <p>how do i can search multiple index content in spring data solr showcase?
  just now i only can search "name".
  for example how do i can search "companyNo"?.
  thanks in advance</p>
  
  <p>sample xml of indexed in solr:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;add&gt;
      &lt;doc&gt;
      &lt;field name="id"&gt;1051879H_15082014_00003457&lt;/field&gt;
      &lt;field name="name"&gt;BEST MEGALINK SDN. BHD.&lt;/field&gt;
      &lt;field name="entityName"&gt;&lt;/field&gt;
      &lt;field name="companyNo"&gt;1051879-H&lt;/field&gt;
      &lt;field name="noticeType"&gt;RMAT_N_C&lt;/field&gt;
      &lt;field name="noticeDate"&gt;15/08/2014&lt;/field&gt;
      &lt;field name="repNames"&gt;&lt;/field&gt;
      &lt;field name="repNames"&gt;&lt;/field&gt;
      &lt;field name="repNames"&gt;&lt;/field&gt;
      &lt;field name="repICs"&gt;&lt;/field&gt;
      &lt;field name="repICs"&gt;&lt;/field&gt;
      &lt;field name="repICs"&gt;&lt;/field&gt;
      &lt;field name="format"&gt;PDF&lt;/field&gt;
      &lt;field name="folder"&gt;15082014&lt;/field&gt;
      &lt;field name="pages"&gt;2&lt;/field&gt;
      &lt;/doc&gt;
  &lt;/add&gt;
  </code></pre>