Add CRD validation (#599)

* add CRD manifests with validation
* update documentation
* patroni slots is not an array but a nested hash map
* make deps call tools
* cover validation in docs and export it in crds.go
* add toggle to disable creation of CRD validation and document it
* use templated service account also for CRD-configured helm deployment

pkg/controller/controller.go

@@ -6,7 +6,7 @@ import (
 	"sync"
 
 	"github.com/sirupsen/logrus"
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	rbacv1beta1 "k8s.io/api/rbac/v1beta1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
@@ -240,7 +240,7 @@ func (c *Controller) initController() {
 	c.initClients()
 
 	if configObjectName := os.Getenv("POSTGRES_OPERATOR_CONFIGURATION_OBJECT"); configObjectName != "" {
-		if err := c.createConfigurationCRD(); err != nil {
+		if err := c.createConfigurationCRD(c.opConfig.EnableCRDValidation); err != nil {
 			c.logger.Fatalf("could not register Operator Configuration CustomResourceDefinition: %v", err)
 		}
 		if cfg, err := c.readOperatorConfigurationFromCRD(spec.GetOperatorNamespace(), configObjectName); err != nil {
@@ -256,7 +256,7 @@ func (c *Controller) initController() {
 
 	c.modifyConfigFromEnvironment()
 
-	if err := c.createPostgresCRD(); err != nil {
+	if err := c.createPostgresCRD(c.opConfig.EnableCRDValidation); err != nil {
 		c.logger.Fatalf("could not register Postgres CustomResourceDefinition: %v", err)
 	}