alignmentScanTests: Remove text output validation of help

'virt-alignment-scan --help' output has changed in fedora 19.
No need to check the actual output text, but only that we
can run 'help'.

Change-Id: I68c64fa6ce39b61d867fd01cbdcb6c31b4ce0435
Signed-off-by: Yeela Kaplan <ykaplan@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/16098
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Tested-by: Douglas Schilling Landgraf <dougsland@redhat.com>