Add goleak to all tests (#227)

* Run goleak as part of all tests
We are already using goleak in various tests.
This commit adds a TestMain to all remaining tests
and calls goleak.VerifyTestMain in them.
* Add goleak to debugd/deploy package and fix bug.
* Run go mod tidy
* Fix integration tests
* Move goleak invocation for mount integration test
* Ignore leak in state integration tests

Co-authored-by: Fabian Kammel <fk@edgelss.systems>

coordinator/kubernetes/k8sapi/kubectl/client/client_test.go

@@ -10,6 +10,7 @@ import (
 	"github.com/edgelesssys/constellation/coordinator/kubernetes/k8sapi/resources"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"go.uber.org/goleak"
 	"google.golang.org/protobuf/proto"
 	apps "k8s.io/api/apps/v1"
 	k8s "k8s.io/api/core/v1"
@@ -26,6 +27,10 @@ import (
 	"k8s.io/client-go/restmapper"
 )
 
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m)
+}
+
 var (
 	corev1GV        = schema.GroupVersion{Version: "v1"}
 	nginxDeployment = &apps.Deployment{

coordinator/kubernetes/k8sapi/kubectl/kubectl_test.go

@@ -6,9 +6,14 @@ import (
 
 	"github.com/edgelesssys/constellation/coordinator/kubernetes/k8sapi/resources"
 	"github.com/stretchr/testify/assert"
+	"go.uber.org/goleak"
 	"k8s.io/cli-runtime/pkg/resource"
 )
 
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m)
+}
+
 type stubClient struct {
 	applyOneObjectErr error
 	getObjectsInfos   []*resource.Info

coordinator/kubernetes/k8sapi/resources/access_manager_test.go

@@ -5,8 +5,13 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"go.uber.org/goleak"
 )
 
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m)
+}
+
 func TestAccessManagerMarshalUnmarshal(t *testing.T) {
 	require := require.New(t)
 	assert := assert.New(t)