Destroying CPVM and SSVM reports an exception

[sanderv32]

If a systemvm is destroyed an exception is thrown. The error from the logfile:

2020-07-15 10:11:08.288 INFO  [c.c.s.v.VolumeServiceImpl] (logid: 0e4393b7) (ctx: 6d47b777) (job: 720) Volume 117 is not referred anywhere, remove it from volumes table
2020-07-15 10:11:08.298 DEBUG [c.c.f.j.i.AsyncJobManagerImpl] (logid: 0e4393b7) (job: 720) Complete async job-720, jobStatus: FAILED, resultCode: 530, result: com.cloud.api.response.ExceptionResponse/null/{"uuidList":[],"errorcode":530,"errortext":"ServerApiException: Fail to destroy system vm"}