QtIFW

fix for Replaces tag

 - covers also the case when remote components are already replaced by another component
 - works also in update mode when the component to be replaced exists only locally but not remotely

Change-Id: I7af08be4484969f4559da7e29e3e8b333b4d9d4e
Reviewed-by: Tim Jenssen <tim.jenssen@nokia.com>