findHighestAlarmStatus: test for no alarm created, code cleaning

dao/src/main/java/org/thingsboard/server/dao/sql/alarm/AlarmRepository.java

@@ -81,7 +81,7 @@ public interface AlarmRepository extends CrudRepository<AlarmEntity, UUID> {
             " AND alarm.originatorId = :entityId" +
             " AND ((:status) IS NULL OR alarm.status in (:status))")
     Set<AlarmSeverity> findAlarmSeverities(@Param("tenantId") UUID tenantId,
-                                                 @Param("entityId") UUID entityId,
-                                                 @Param("status") Set<AlarmStatus> status);
+                                           @Param("entityId") UUID entityId,
+                                           @Param("status") Set<AlarmStatus> status);
 
 }

dao/src/test/java/org/thingsboard/server/dao/service/BaseAlarmServiceTest.java

@@ -368,6 +368,9 @@ public abstract class BaseAlarmServiceTest extends AbstractServiceTest {
         customerDevice.setCustomerId(customer.getId());
         customerDevice = deviceService.saveDevice(customerDevice);
 
+        // no one alarms was created
+        Assert.assertNull(alarmService.findHighestAlarmSeverity(tenantId, customerDevice.getId(), null, null));
+
         Alarm alarm1 = Alarm.builder()
                 .tenantId(tenantId)
                 .originator(customerDevice.getId())