webadmin: Hide CPU Name field in Gluster only mode

  Hiding CPU Name field in gluster only mode.

Change-Id: I77dd80f93586358bcd5f5602da2248c4fd51faf3
Bug-Url: https://bugzilla.redhat.com/1021397
Signed-off-by: Ramesh Nachimuthu <rnachimu@redhat.com>