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/ratelimiter/doc.go

@@ -0,0 +1,22 @@
+/*
+Copyright 2020 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 ratelimiter defines rate limiters used by Controllers to limit how frequently requests may be queued.
+
+Typical rate limiters that can be used are implemented in client-go's workqueue package.
+*/
+package ratelimiter

vendor/sigs.k8s.io/controller-runtime/pkg/ratelimiter/ratelimiter.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2020 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 ratelimiter
+
+import "time"
+
+// RateLimiter is an identical interface of client-go workqueue RateLimiter.
+type RateLimiter interface {
+	// When gets an item and gets to decide how long that item should wait
+	When(item interface{}) time.Duration
+	// Forget indicates that an item is finished being retried.  Doesn't matter whether its for perm failing
+	// or for success, we'll stop tracking it
+	Forget(item interface{})
+	// NumRequeues returns back how many failures the item has had
+	NumRequeues(item interface{}) int
+}