webadmin: show hosted engine info in host>general tab

Display a single entry in the host > general tab displaying hosted
engine status, if it is configured on the selected host.

Change-Id: I17f0eff120b2ab99b4badc53da1780c1e758299c
Bug-Url: https://bugzilla.redhat.com/1047649
Signed-off-by: Greg Padgett <gpadgett@redhat.com>