packaging: Fix storage_format_type default value

Somewhere in the squashing and migration of the db scripts the default
value of storage_domain_static.storage_format_type was lost.

This patch restores it to the value it had before these patches in order
to allow the DAO tests to run.

Change-Id: I0cecc99eeaf09d4646925c58d5785da4bd0dae0d
Signed-off-by: Allon Mureinik <amureini@redhat.com>
Signed-off-by: Yair Zaslavsky <yzaslavs@redhat.com>