ovirt-reports: Reports should use current sessionID

Reports should use the new sessionID
to get session user from engine if
the sessionID has changed

Change-Id: I2e7a83b80144696639228889494a929fe4480d0a
Bug-Url: https://bugzilla.redhat.com/1116851
Signed-off-by: Ravi Nori <rnori@redhat.com>
Signed-off-by: Yaniv Dary <ydary@redhat.com>