Engine: add Admin password and OrgName for Sysprep

Changes:
DB: added org_name column to vm_init table
restapi: added org_name field to initialization element
UI: Sysprep two new fields: admin-password, organization-name
engine: set Sysprep appropriate values for admin-password and organization-name

Change-Id: Ie33cce7b395ba8e7e7a46bc31a7564410f808888
https://bugzilla.redhat.com/1025831
Signed-off-by: Shahar Havivi <shaharh@redhat.com>