Adds availability zone info to System Info panel

Also moves the host aggregates data into System Info panel
because it's exactly the type of static information that
belongs there, and it reduces a significant amount of
boilerplate.

Incidentally adds a new table feature to make listing
out unordered lists of items easier.

Implements blueprint show-zone-for-admin

Change-Id: Id8fb5c9615b018135a5d90eaa82eb80ff63bb7dc
Enable H302 check

This patch replaces some method imports with module imports and
makes H302 test enabled.

Fixes bug 1188531

Change-Id: Ibfbddeaa19cbbb244da58ffd5c918c41f03a0c65