Currently there is a soft dependency on qtjsondb. This change makes it
a hard dependency.

Change-Id: Iba29c91093c3c6c67c4121f6f220e62686708040
Reviewed-by: abcd <amos.choy@nokia.com>
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
Reviewed-by: Aaron McCarthy <aaron.mccarthy@nokia.com>