packaging: setup: wrong iso domain structure

previously the iso data domain was created with
wrong file permissions and with a wrong
SDUUID in metadata file.
Aligned meadata content with the same values obtained
by iso domain creation through web app.
Also fixed the creation of empty files conforming
to otopi changes done in http://gerrit.ovirt.org/18690
and leases file allocation using http://gerrit.ovirt.org/18922.

Change-Id: I0467b6ad54d362a84ee8d14156d94c01bc71c8fe
Bug-Url: https://bugzilla.redhat.com/1004005
Bug-Url: https://bugzilla.redhat.com/1004395
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>