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>

cli/internal/cloudcmd/clients_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"strconv"
+	"testing"
 
 	azurecl "github.com/edgelesssys/constellation/cli/internal/azure/client"
 	gcpcl "github.com/edgelesssys/constellation/cli/internal/gcp/client"
@@ -12,8 +13,16 @@ import (
 	"github.com/edgelesssys/constellation/internal/cloud/cloudtypes"
 	"github.com/edgelesssys/constellation/internal/gcpshared"
 	"github.com/edgelesssys/constellation/internal/state"
+	"go.uber.org/goleak"
 )
 
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m,
+		// https://github.com/census-instrumentation/opencensus-go/issues/1262
+		goleak.IgnoreTopFunction("go.opencensus.io/stats/view.(*worker).start"),
+	)
+}
+
 type fakeAzureClient struct {
 	nodes        cloudtypes.Instances
 	coordinators cloudtypes.Instances