A cool feature grafana has is the ability to template dashboards with
variables. This code now provides that ability to the user.
Change-Id: Ib2f565e3d39523105b2c07d29d5257494a8bae67
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
This is important for stacked graphs so that the tooltip can show
individual, rather than cumulative values (which makes the most
sense for our node graphs).
Also, sort the elements in the schema. I think keeping them all
in order makes more sense than required/optional sections.
Change-Id: Ie542dc4d0e151a00e84cc970c2cfa8c02377d7bf