channeldb+wtdb: fix migration function name lint

Rename the ApplyMigrationWithDb function to ApplyMigrationWithDB to make
the linter happy.

channeldb/migration30/migration_test.go

@@ -103,7 +103,7 @@ func TestMigrateRevocationLog(t *testing.T) {
 				return nil
 			}
 
-			migtest.ApplyMigrationWithDb(
+			migtest.ApplyMigrationWithDB(
 				t,
 				beforeMigration,
 				afterMigration,
@@ -560,7 +560,7 @@ func BenchmarkMigration(b *testing.B) {
 	}
 
 	// Run the migration test.
-	migtest.ApplyMigrationWithDb(
+	migtest.ApplyMigrationWithDB(
 		b,
 		beforeMigration,
 		nil,

channeldb/migtest/migtest.go

@@ -84,12 +84,12 @@ func ApplyMigration(t *testing.T,
 	}
 }
 
-// ApplyMigrationWithDb is a helper test function that encapsulates the general
+// ApplyMigrationWithDB is a helper test function that encapsulates the general
 // steps which are needed to properly check the result of applying migration
 // function. This function differs from ApplyMigration as it requires the
 // supplied migration functions to take a db instance and construct their own
 // database transactions.
-func ApplyMigrationWithDb(t testing.TB, beforeMigration, afterMigration,
+func ApplyMigrationWithDB(t testing.TB, beforeMigration, afterMigration,
 	migrationFunc func(db kvdb.Backend) error, shouldFail bool) {
 
 	t.Helper()

watchtower/wtdb/migration4/client_db_test.go

@@ -237,7 +237,7 @@ func TestMigrateAckedUpdates(t *testing.T) {
 			// summary bucket and a new index bucket.
 			after := after(test.shouldFail, test.pre, test.post)
 
-			migtest.ApplyMigrationWithDb(
+			migtest.ApplyMigrationWithDB(
 				t, before, after, MigrateAckedUpdates(2),
 				test.shouldFail,
 			)