[Solr Wiki] Update of "DataImportHandler" by MattParker

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The "DataImportHandler" page has been changed by MattParker.
The comment on this change is: Modified the implicit fields generated by FileListEntityProcessor. Added fileDir. fileName is currently not being populated. The file's name is mapped to the field named 'file'. Bug report submitted..
http://wiki.apache.org/solr/DataImportHandler?action=diff&rev1=277&rev2=278

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      </document>
  </dataConfig>
  }}}
- Do not miss the `rootEntity` attribute. The implicit fields generated by the !FileListEntityProcessor are `fileAbsolutePath, fileSize, fileLastModified, fileName` and these are available for use within the entity X as shown above. It should be noted that !FileListEntityProcessor returns a list of pathnames and that the subsequent entity must use the !FileDataSource to fetch the files content.
+ Do not miss the `rootEntity` attribute. The implicit fields generated by the !FileListEntityProcessor are `fileDir, fileAbsolutePath, fileSize, fileLastModified, fileName` and these are available for use within the entity X as shown above. It should be noted that !FileListEntityProcessor returns a list of pathnames and that the subsequent entity must use the !FileDataSource to fetch the files content.
  
  === CachedSqlEntityProcessor ===
  <<Anchor(cached)>>