sosreport: use service status instead of initd script

Using initd script obviously fails on el7...

Change-Id: Id05fdc9212f175bdffc29d084659ab3609d175c6
Signed-off-by: Yeela Kaplan <ykaplan@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/35504
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Reviewed-by: Sandro Bonazzola <sbonazzo@redhat.com>