public Builder withSolrXml(Path solrXml){
  try {
    this.solrxml=new String(Files.readAllBytes(solrXml),Charset.defaultCharset());
  }
 catch (  IOException e) {
    throw new RuntimeException(e);
  }
  return this;
}

public Builder withSolrXml ( Path solrXml ) { try { this . solrxml = new String ( Files . readAllBytes ( solrXml ) , Charset . defaultCharset ( ) ) ; } catch ( IOException e ) { throw new RuntimeException ( e ) ; } return this ; }
read solr . xml from the provided path
