PMM-9870 fix test and linters.

Author: BupycHuk

exporter/common.go

@@ -106,6 +106,7 @@ func makeExcludeFilter(exclude []string) *primitive.E {
 	if len(exclude) == 0 {
 		return nil
 	}
+
 	filterExpressions := make([]bson.D, 0, len(exclude))
 	for _, dbname := range exclude {
 		filterExpressions = append(filterExpressions,
@@ -117,11 +118,11 @@ func makeExcludeFilter(exclude []string) *primitive.E {
 }
 
 func makeDBsFilter(filterInNamespaces []string) *primitive.E {
-
 	nss := removeEmptyStrings(filterInNamespaces)
 	if len(nss) == 0 {
 		return nil
 	}
+
 	filterExpressions := make([]bson.D, 0, len(nss))
 	for _, namespace := range nss {
 		parts := strings.Split(namespace, ".")

exporter/diagnostic_data_collector_test.go

@@ -44,7 +44,6 @@ func TestDiagnosticDataCollector(t *testing.T) {
 
 	client := tu.DefaultTestClient(ctx, t)
 	logger := logrus.New()
-	logger.SetLevel(logrus.DebugLevel)
 	ti := labelsGetterMock{}
 
 	dbBuildInfo, err := retrieveMongoDBBuildInfo(ctx, client, logger.WithField("component", "test"))

exporter/replset_config_collector_test.go

@@ -40,7 +40,7 @@ func TestReplsetConfigCollector(t *testing.T) {
 
 	// The last \n at the end of this string is important
 	expected := strings.NewReader(`
-	# HELP mongodb_rs_cfg_protocolVersion rs_cfg.
+	# HELP mongodb_rs_cfg_protocolVersion rs_cfg.protocolVersion
 	# TYPE mongodb_rs_cfg_protocolVersion untyped
 	mongodb_rs_cfg_protocolVersion 1` + "\n")
 	// Filter metrics for 2 reasons: