Add AGE column to crossplane crd template. (#436)

Signed-off-by: Bob Haddleton <[email protected]>

Author: bobh66

templates/crossplane/apis/crd.go.tpl

@@ -63,6 +63,7 @@ type {{ .CRD.Kind }}Status struct {
 // +kubebuilder:printcolumn:name="READY",type="string",JSONPath=".status.conditions[?(@.type=='Ready')].status"
 // +kubebuilder:printcolumn:name="SYNCED",type="string",JSONPath=".status.conditions[?(@.type=='Synced')].status"
 // +kubebuilder:printcolumn:name="EXTERNAL-NAME",type="string",JSONPath=".metadata.annotations.crossplane\\.io/external-name"
+// +kubebuilder:printcolumn:name="AGE",type="date",JSONPath=".metadata.creationTimestamp"
 // +kubebuilder:subresource:status
 // +kubebuilder:storageversion
 // +kubebuilder:resource:scope=Cluster,categories={crossplane,managed,aws}