webadmin: add DirectLUN disk - hide disk profile

Disk profile is not applicable for DirectLUN disks,
hence, hide from DirectLUN disks dialog.

Change-Id: If070376361b67d3502ea8d23c3198d1ed05e08d4
Bug-Url: https://bugzilla.redhat.com/1133776
Signed-off-by: Daniel Erez <derez@redhat.com>