test: Match cluster namespace to cluster name (#652)

**What problem does this PR solve?**:
Matches cluster namespace to cluster name. Thanks to @supershal, who
spotted a similar issue in PR #648.

**Which issue(s) this PR fixes**:
Fixes #

**How Has This Been Tested?**:
<!--
Please describe the tests that you ran to verify your changes.
Provide output from the tests and any manual steps needed to replicate
the tests.
-->

**Special notes for your reviewer**:
<!--
Use this to provide any additional information to the reviewers.
This may include:
- Best way to review the PR.
- Where the author wants the most review attention on.
- etc.
-->

Author: dlipovetsky

pkg/handlers/generic/mutation/controlplanevirtualip/inject_test.go

@@ -100,7 +100,7 @@ var _ = Describe("Generate ControlPlane virtual IP patches", func() {
 			cluster: &clusterv1.Cluster{
 				ObjectMeta: metav1.ObjectMeta{
 					Name:      request.ClusterName,
-					Namespace: metav1.NamespaceDefault,
+					Namespace: request.Namespace,
 				},
 				Spec: clusterv1.ClusterSpec{
 					Topology: &clusterv1.Topology{
@@ -171,7 +171,7 @@ var _ = Describe("Generate ControlPlane virtual IP patches", func() {
 			cluster: &clusterv1.Cluster{
 				ObjectMeta: metav1.ObjectMeta{
 					Name:      request.ClusterName,
-					Namespace: metav1.NamespaceDefault,
+					Namespace: request.Namespace,
 				},
 				Spec: clusterv1.ClusterSpec{
 					Topology: &clusterv1.Topology{

pkg/handlers/generic/mutation/extraapiservercertsans/inject_test.go

@@ -77,7 +77,7 @@ var _ = Describe("Generate Extra API server certificate patches", func() {
 			cluster: clusterv1.Cluster{
 				ObjectMeta: metav1.ObjectMeta{
 					Name:      "test-cluster",
-					Namespace: metav1.NamespaceDefault,
+					Namespace: request.Namespace,
 					Labels: map[string]string{
 						clusterv1.ProviderNameLabel: "aws",
 					},
@@ -119,7 +119,7 @@ var _ = Describe("Generate Extra API server certificate patches", func() {
 			cluster: clusterv1.Cluster{
 				ObjectMeta: metav1.ObjectMeta{
 					Name:      "test-cluster",
-					Namespace: metav1.NamespaceDefault,
+					Namespace: request.Namespace,
 					Labels: map[string]string{
 						clusterv1.ProviderNameLabel: "docker",
 					},
@@ -160,7 +160,7 @@ var _ = Describe("Generate Extra API server certificate patches", func() {
 			cluster: clusterv1.Cluster{
 				ObjectMeta: metav1.ObjectMeta{
 					Name:      "test-cluster",
-					Namespace: metav1.NamespaceDefault,
+					Namespace: request.Namespace,
 					Labels: map[string]string{
 						clusterv1.ProviderNameLabel: "nutanix",
 					},