Code review comment for lp:~thumper/juju-core/container-hardware-characteristics

LGTM but I'd like to see the tests more proscriptive. eg we know what
arch has to be so test that rather than no nil.

https://codereview.appspot.com/36980043/diff/1/container/kvm/live_test.go
File container/kvm/live_test.go (right):

https://codereview.appspot.com/36980043/diff/1/container/kvm/live_test.go#newcode101
container/kvm/live_test.go:101: c.Assert(hardware, gc.Not(gc.Equals),
&instance.HardwareCharacteristics{})
I do think we should be asserting an actual expected value, not just
"not nil"

https://codereview.appspot.com/36980043/