Add Quota Check During Cluster Deploy #87
Description
AWS now has a Service Quotas API that allows accessing quotas for a given resource type. https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/servicequotas/AWSServiceQuotas.html#listServices-com.amazonaws.services.servicequotas.model.ListServicesRequest-
Herman cluster deploys should check that there's sufficient quota space to deploy a new fleet of instances before starting the actual deploy, so that users can get quicker feedback that they need to increase a quota rather than waiting for a CloudFormation rollback.