Update filedata example to no longer use deprecated methods

Between Accumulo 2.0.x and 2.1.x, several methods have been deprecated. The fileData example currently relies on these methods. It would be good to update the example to use the latest methods and remove dependency on deprecated methods.

This issue specifically addresses the 2.1 line of accumulo examples running against the 2.1.x line of Accumulo development. Issue #109 address the need for the example to be updated for the 3.x line of Accumulo.