Widget gets corrupted if device battery is removed while uninstalling it.

Widget gets corrupted if device battery is removed while uninstalling it.

 *** This patch is just a temporary fix. See [Remarks] section. ***

[Issue#]   WGL-580
[Problem]  Uninstallation is broken if battery is removed when uninstalling.
[Cause]    Db is cleaned up but files are still present.
[Solution] Ignore existing files for new installation.

[Remarks]
 If widget was uninstalled (no db information).
 Source of problem is that installation/uninstalaltion is not fully transactional
 and there is no information that something is to be fixed.
 This is just a temporary fix. This is currently losing disc space
 for widgets that will not be installed again.

Separate solution (daemon/boot time/...) for fixing unfinshed jobs should be proposed.

[Verification] Build repo and (as in issue):
 1) Install a heavy widget.
 2) Uninstall the same the widget.
 3) While uninstalling the widget, remove battery.
 4) Again install the same widget.( on step 3, widget is un-installed)

* Use widget attached in https://bugs.tizendev.org/jira/browse/WGL-580

Change-Id: I3e840cc5c508fe9951c77cabfceb377fb996a927