rebase: add controller runtime dependency

this commits add the controller runtime
and its dependency to the vendor.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/sigs.k8s.io/controller-runtime/pkg/webhook/alias.go

@@ -0,0 +1,73 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package webhook
+
+import (
+	"gomodules.xyz/jsonpatch/v2"
+	"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
+)
+
+// define some aliases for common bits of the webhook functionality
+
+// Defaulter defines functions for setting defaults on resources
+type Defaulter = admission.Defaulter
+
+// Validator defines functions for validating an operation
+type Validator = admission.Validator
+
+// AdmissionRequest defines the input for an admission handler.
+// It contains information to identify the object in
+// question (group, version, kind, resource, subresource,
+// name, namespace), as well as the operation in question
+// (e.g. Get, Create, etc), and the object itself.
+type AdmissionRequest = admission.Request
+
+// AdmissionResponse is the output of an admission handler.
+// It contains a response indicating if a given
+// operation is allowed, as well as a set of patches
+// to mutate the object in the case of a mutating admission handler.
+type AdmissionResponse = admission.Response
+
+// Admission is webhook suitable for registration with the server
+// an admission webhook that validates API operations and potentially
+// mutates their contents.
+type Admission = admission.Webhook
+
+// AdmissionHandler knows how to process admission requests, validating them,
+// and potentially mutating the objects they contain.
+type AdmissionHandler = admission.Handler
+
+// AdmissionDecoder knows how to decode objects from admission requests.
+type AdmissionDecoder = admission.Decoder
+
+// JSONPatchOp represents a single JSONPatch patch operation.
+type JSONPatchOp = jsonpatch.Operation
+
+var (
+	// Allowed indicates that the admission request should be allowed for the given reason.
+	Allowed = admission.Allowed
+
+	// Denied indicates that the admission request should be denied for the given reason.
+	Denied = admission.Denied
+
+	// Patched indicates that the admission request should be allowed for the given reason,
+	// and that the contained object should be mutated using the given patches.
+	Patched = admission.Patched
+
+	// Errored indicates that an error occurred in the admission request.
+	Errored = admission.Errored
+)