Fix tests

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

@@ -138,7 +138,7 @@ public abstract class BaseDeviceCredentialsCacheTest extends AbstractServiceTest
             Object target = ((Advised) deviceCredentialsService).getTargetSource().getTarget();
             return (DeviceCredentialsService) target;
         }
-        return null;
+        return deviceCredentialsService;
     }
 
     private DeviceCredentials createDummyDeviceCredentialsEntity(String deviceCredentialsId) {

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

@@ -68,7 +68,7 @@ public abstract class BaseRelationCacheTest extends AbstractServiceTest {
             Object target = ((Advised) relationService).getTargetSource().getTarget();
             return (RelationService) target;
         }
-        return null;
+        return relationService;
     }
 
     @Test