remove wal type and distinguish source between nakadi and sqs

pkg/apis/acid.zalan.do/v1/crds.go

@@ -701,9 +701,6 @@ var PostgresCRDResourceValidation = apiextv1.CustomResourceValidation{
 											{
 												Raw: []byte(`"sqs"`),
 											},
-											{
-												Raw: []byte(`"wal"`),
-											},
 										},
 									},
 								},

pkg/apis/zalando.org/v1alpha1/fabriceventstream.go

@@ -69,7 +69,7 @@ type EventStreamSource struct {
 // EventStreamTable defines the name and ID column to be used for streaming
 type EventStreamTable struct {
 	Name     string `json:"name"`
-	IDColumn string `json:"idColumn,omitempty" defaults:"id"`
+	IDColumn string `json:"idColumn,omitempty"`
 }
 
 // Connection to be used for allowing the FES operator to connect to a database