linter: fix lint issues after linter v2 update

test/chainnotifier_mock.go

@@ -15,8 +15,8 @@ import (
 
 type mockChainNotifier struct {
 	lndclient.ChainNotifierClient
-
 	sync.Mutex
+
 	lnd               *LndMockServices
 	confRegistrations []*ConfRegistration
 	wg                sync.WaitGroup

test/lightning_client_mock.go

@@ -21,12 +21,12 @@ import (
 )
 
 type mockLightningClient struct {
-	lnd *LndMockServices
-	wg  sync.WaitGroup
-
 	// Embed lndclient's interface so that lndclient can be expanded
 	// without the need to implement unused functions on the mock.
 	lndclient.LightningClient
+
+	lnd *LndMockServices
+	wg  sync.WaitGroup
 }
 
 // PayInvoice pays an invoice.

test/router_mock.go

@@ -9,6 +9,7 @@ import (
 
 type mockRouter struct {
 	lndclient.RouterClient
+
 	lnd *LndMockServices
 }