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/strings/escape.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2014 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 strings
+
+import (
+	"strings"
+)
+
+// EscapeQualifiedName converts a plugin name, which might contain a / into a
+// string that is safe to use on-disk.  This assumes that the input has already
+// been validates as a qualified name.  we use "~" rather than ":" here in case
+// we ever use a filesystem that doesn't allow ":".
+func EscapeQualifiedName(in string) string {
+	return strings.Replace(in, "/", "~", -1)
+}
+
+// UnescapeQualifiedName converts an escaped plugin name (as per EscapeQualifiedName)
+// back to its normal form.  This assumes that the input has already been
+// validates as a qualified name.
+func UnescapeQualifiedName(in string) string {
+	return strings.Replace(in, "~", "/", -1)
+}

e2e/vendor/k8s.io/utils/strings/line_delimiter.go

@@ -0,0 +1,64 @@
+/*
+Copyright 2015 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 strings
+
+import (
+	"bytes"
+	"io"
+	"strings"
+)
+
+// LineDelimiter is a filter that will split input on lines
+// and bracket each line with the delimiter string.
+type LineDelimiter struct {
+	output    io.Writer
+	delimiter []byte
+	buf       bytes.Buffer
+}
+
+// NewLineDelimiter allocates a new io.Writer that will split input on lines
+// and bracket each line with the delimiter string.  This can be useful in
+// output tests where it is difficult to see and test trailing whitespace.
+func NewLineDelimiter(output io.Writer, delimiter string) *LineDelimiter {
+	return &LineDelimiter{output: output, delimiter: []byte(delimiter)}
+}
+
+// Write writes buf to the LineDelimiter ld. The only errors returned are ones
+// encountered while writing to the underlying output stream.
+func (ld *LineDelimiter) Write(buf []byte) (n int, err error) {
+	return ld.buf.Write(buf)
+}
+
+// Flush all lines up until now.  This will assume insert a linebreak at the current point of the stream.
+func (ld *LineDelimiter) Flush() (err error) {
+	lines := strings.Split(ld.buf.String(), "\n")
+	for _, line := range lines {
+		if _, err = ld.output.Write(ld.delimiter); err != nil {
+			return
+		}
+		if _, err = ld.output.Write([]byte(line)); err != nil {
+			return
+		}
+		if _, err = ld.output.Write(ld.delimiter); err != nil {
+			return
+		}
+		if _, err = ld.output.Write([]byte("\n")); err != nil {
+			return
+		}
+	}
+	return
+}

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

@@ -0,0 +1,46 @@
+/*
+Copyright 2014 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 strings
+
+import (
+	"path"
+	"strings"
+)
+
+// SplitQualifiedName Splits a fully qualified name and returns its namespace and name.
+// Assumes that the input 'str' has been validated.
+func SplitQualifiedName(str string) (string, string) {
+	parts := strings.Split(str, "/")
+	if len(parts) < 2 {
+		return "", str
+	}
+	return parts[0], parts[1]
+}
+
+// JoinQualifiedName joins 'namespace' and 'name' and returns a fully qualified name
+// Assumes that the input is valid.
+func JoinQualifiedName(namespace, name string) string {
+	return path.Join(namespace, name)
+}
+
+// ShortenString returns the first N slice of a string.
+func ShortenString(str string, n int) string {
+	if len(str) <= n {
+		return str
+	}
+	return str[:n]
+}