title: Karaf update bundles via xml feature file
body: <p>Scenario:</p>
  
  <p>a feature xml file that describe an application (V1.0) with a bundle (suppose gson) version 2.2.3</p>
  
  <p>A second feature file with a newer application (V1.1) version and with a gson bundle version 2.2.4</p>
  
  <p>they will install gson 2.2.3 and 2.2.4 side-by-side.</p>
  
  <p>Question:</p>
  
  <p>is it possible by means of xml file (i've seen the xsd and no hints for me there) to UPGRADE from V1.0 to V1.1 AND uninstall at same time the unnecessary gson 2.2.3</p>