add s2i support

pkg/simple/client/k8s/s2iclient.go

@@ -0,0 +1,31 @@
+package k8s
+
+import (
+	"log"
+	"sync"
+
+	s2i "github.com/kubesphere/s2ioperator/pkg/client/clientset/versioned"
+)
+
+var (
+	s2iClient     *s2i.Clientset
+	s2iClientOnce sync.Once
+)
+
+func S2iClient() *s2i.Clientset {
+
+	s2iClientOnce.Do(func() {
+
+		config, err := Config()
+
+		if err != nil {
+			log.Fatalln(err)
+		}
+
+		s2iClient = s2i.NewForConfigOrDie(config)
+
+		KubeConfig = config
+	})
+
+	return s2iClient
+}