Set EvaluateTargetHealth to 'true' when creating failover ALIASes
Set EvaluateTargetHealth to 'true' when creating failover ALIASes

For 'primary' failover RRsets a health check is required, either
explicit or using the target health. As cli53 has no way yet to create
health checks, and typically we'd be using an ELB or similar as primary
use the target health for now.

Collaborne/cli53,Collaborne/cli53