title: Generate random number during Maven build
body: <p>Is there a plugin (or another easy way) to generate a "random" number as part of a Maven build? I would like to assign this number to a property that I can then use in the <code>pom.xml</code> file for some other purposes, e.g. for a filter value.</p>
  
  <p>The number doesn't have to be completely random (hence the quotes), something using the current timestamp as a seed would be perfectly OK.</p>