Merge branch 'putVmsOnBackupError' into '4.20.0.0-scclouds'

Definição do estado `BackupError` para VMs que falharam ao remover a oferta de _backup_

Closes #3292

See merge request scclouds/scclouds!1370

Author: SadiJr

plugins/backup/knib/src/main/java/org/apache/cloudstack/backup/KnibBackupProvider.java

@@ -307,6 +307,11 @@ public boolean removeVMFromBackupOffering(VirtualMachine vm, boolean removeBacku
             setEndOfChainAndRemoveCurrentForBackup(current);
             return true;
         }
+        UserVmVO vmVO = userVmDao.findById(vm.getId());
+        logger.error("Failed to merge deltas for VM [{}] during backup offering removal process. Changing its state to [{}].", vm, VirtualMachine.State.BackupError);
+        vmVO.setState(VirtualMachine.State.BackupError);
+        userVmDao.update(vmVO.getId(), vmVO);
+
         return false;
     }