provide event stream API

completed codegen manually
provide update and compare code for fes
add db check for specified databases and tables
add unit test

pkg/generated/clientset/versioned/scheme/register.go

@@ -26,6 +26,7 @@ package scheme
 
 import (
 	acidv1 "github.com/zalando/postgres-operator/pkg/apis/acid.zalan.do/v1"
+	zalandov1alpha1 "github.com/zalando/postgres-operator/pkg/apis/zalando.org/v1alpha1"
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
 	schema "k8s.io/apimachinery/pkg/runtime/schema"
@@ -38,6 +39,7 @@ var Codecs = serializer.NewCodecFactory(Scheme)
 var ParameterCodec = runtime.NewParameterCodec(Scheme)
 var localSchemeBuilder = runtime.SchemeBuilder{
 	acidv1.AddToScheme,
+	zalandov1alpha1.AddToScheme,
 }
 
 // AddToScheme adds all types of this clientset into the given scheme. This allows composition