CLOUD-610 rename 'hostGroup' field that is missing from usages json to instanceGroup
CLOUD-610 rename 'hostGroup' field that is missing from usages json to instanceGroup

hortonworks/cloudbreak,sequenceiq/cloudbreak,hortonworks/cloudbreak,hortonworks/cloudbreak,sequenceiq/cloudbreak,sequenceiq/cloudbreak,sequenceiq/cloudbreak,hortonworks/cloudbreak,sequenceiq/cloudbreak,hortonworks/cloudbreak,hortonworks/cloudbreak