[Tizen] Do not use Crosswalk daemon when uninstalling webapps

This patch allows 'xwalkctl' to uninstall an application even
without Crosswalk daemon involved. The running app however
should be terminated before uninstallation.
Merge pull request #2145 from pozdnyakov/app_uninstallation

[Tizen] Do not use Crosswalk daemon when uninstalling webapps