add mock for VmIsoMapDao in UserVmJoinDaoImplTest and set lenient behavior for listByVmId

Author: Damans227

server/src/test/java/com/cloud/api/query/dao/UserVmJoinDaoImplTest.java

@@ -83,6 +83,9 @@ public class UserVmJoinDaoImplTest extends GenericDaoBaseWithTagInformationBaseT
     @Mock
     private VMTemplateDao vmTemplateDao;
 
+    @Mock
+    private com.cloud.vm.dao.VmIsoMapDao vmIsoMapDao;
+
     @Mock
     ExtensionHelper extensionHelper;
 
@@ -103,6 +106,8 @@ public class UserVmJoinDaoImplTest extends GenericDaoBaseWithTagInformationBaseT
     @Before
     public void setup() {
         closeable = openMocks(this);
+        org.mockito.Mockito.lenient().when(vmIsoMapDao.listByVmId(org.mockito.ArgumentMatchers.anyLong()))
+                .thenReturn(java.util.Collections.emptyList());
         prepareSetup();
     }