webadmin: Hide host virt details in gluster mode

When the application is running in gluster only mode,
Virtulization related details of the host will be hidden.

Change-Id: I94612b97ce8709ece57f191b57e5e185ee3e7d32
Bug-Url: https://bugzilla.redhat.com/907326
Signed-off-by: Kanagaraj M <kmayilsa@redhat.com>