build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/k8s.io/utils/inotify/inotify.go

@@ -0,0 +1,45 @@
+/*
+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 inotify // import "k8s.io/utils/inotify"
+
+import (
+	"sync"
+)
+
+// Event represents a notification
+type Event struct {
+	Mask   uint32 // Mask of events
+	Cookie uint32 // Unique cookie associating related events (for rename(2))
+	Name   string // File name (optional)
+}
+
+type watch struct {
+	wd    uint32 // Watch descriptor (as returned by the inotify_add_watch() syscall)
+	flags uint32 // inotify flags of this watch (see inotify(7) for the list of valid flags)
+}
+
+// Watcher represents an inotify instance
+type Watcher struct {
+	mu       sync.Mutex
+	fd       int               // File descriptor (as returned by the inotify_init() syscall)
+	watches  map[string]*watch // Map of inotify watches (key: path)
+	paths    map[int]string    // Map of watched paths (key: watch descriptor)
+	Error    chan error        // Errors are sent on this channel
+	Event    chan *Event       // Events are returned on this channel
+	done     chan bool         // Channel for sending a "quit message" to the reader goroutine
+	isClosed bool              // Set to true when Close() is first called
+}