Reduce db access

Reduce db access

To improve initialization performance, this patch reduces to access to
the pkgmgr db. Before loading all applications information, AMD creates
the app property handle of the user. After this patch is applied, AMD
does not load the metadata information while calling _app_property_load().
The metadata will be inserted when a new appinfo is inserted automatically
at the initialization time.

Change-Id: I48917276ff870b2b98591780d0b13e9825cf6d67
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>