webadmin : Hide "Architecture" from Cluster popup in gluster mode

Hide "Architecture" from Cluster popup in gluster mode

Change-Id: I3fd2a21e1dc28a44e906994cf3d6e59106ca1f68
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1097082
Signed-off-by: Anmol Babu <anbabu@redhat.com>