add openapi-gen=true for some structs (#510)

apis/condition_types.go

@@ -55,6 +55,7 @@ const (
 // Conditions defines a readiness condition for a Knative resource.
 // See: https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#typical-status-properties
 // +k8s:deepcopy-gen=true
+// +k8s:openapi-gen=true
 type Condition struct {
 	// Type of condition.
 	// +required

apis/duck/v1beta1/status_types.go

@@ -36,6 +36,7 @@ var _ duck.Implementable = (*Conditions)(nil)
 
 // +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+// +k8s:openapi-gen=true
 
 // KResource is a skeleton type wrapping Conditions in the manner we expect
 // resource writers defining compatible resources to embed it.  We will

apis/volatile_time.go

@@ -22,6 +22,7 @@ import (
 )
 
 // VolatileTime wraps metav1.Time
+// +k8s:openapi-gen=true
 type VolatileTime struct {
 	Inner metav1.Time
 }