WidgetHandle removal - part 2. Task order change

WidgetHandle removal - part 2. Task order change

[Issue#]       N/A
[Feature]      Removing widget handle usage from wrt-installer. Tasks are reordered to task_database be the last one
[Cause]        N/A
[Solution]     N/A
[Verification] Do follwing steps:
1. Install, uninstall, update any widget - use each option, listed in help.
2. Checks database content of WidgetInfo after installling several widgets. Database should contains autoincremented value of WidgetHandle value.
3. Run installed widgets as well after installing and reinstalling.
4. Install just one widget before and after appling change -> make dumps and compare them (echo ".dump" | sqlite3 /opt/dbspace/.wrt.db > dumps/dump.sql).
They should be almost equal - widgethandle value, schema of WidgetInfo, DB hash and sequence creation for WidgetInfo may differs.

[SCMRequest]   This change should be merged same time as following wrt-commons changes (change id given):
-   Ib82cbbf575d88a9ce764652fa65037a7b990340a

Change-Id: I05a81d43a97f2a490d490edf62a5ef874c3477f5