QtIFW

no longer use Version as the repository format version

Use the Version value defined in config.xml as the product version
exclusively instead of sometimes using it as the repository format
version in components.xml (which must be 1.0.0) and sometimes as the
product version.

Change-Id: I63864947bf131ac6e246a2aaf6febdda0555c13d
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>
Reviewed-by: Niels Weber <niels.weber@theqtcompany.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>