In #235 we accidentally included an entire disks.pm test that
wasn't meant to be there - the infocenter module test is the
right thing to exercise plasma-disks, there is no standalone
app, running 'disks' just gets you the KDE Partition Manager,
which we already test. So this removes that test and renames a
needle that looks like it's for that test but is actually for
the kinfocenter module, to make this clearer.
Signed-off-by: Adam Williamson <awilliam@redhat.com>
