Clean stray file in addzone test

The !4944 merge request added a Python test which on Ubuntu 16.04
(Xenial) produces a stray file ./.cache/v/cache/lastfailed. This file
needs to be cleaned for the test not to fail on this OS.
77 jobs for !4949 with mnowak/addzone-remove-.cache-v-cache-lastfailed-file in 5 minutes and 39 seconds (queued for 8 seconds)
latest detached
Status Job ID Name Coverage
  Precheck
passed #1671894
amd64 linux
autoreconf

00:00:15

passed #1671896
amd64 linux
clang-format

00:00:16

passed #1671897
amd64 linux
coccinelle

00:03:34

passed #1671898
amd64 linux
danger

00:00:15

passed #1671895
amd64 linux
misc

00:00:15

 
  Build
passed #1671911
amd64 linux
clang:asan

00:03:51

passed #1671915
amd64 linux
clang:buster:amd64

00:01:59

passed #1671918
amd64 libvirt
clang:freebsd11:amd64

00:01:57

passed #1671919
amd64 libvirt
clang:freebsd12:amd64

00:01:46

passed #1671920
amd64 libvirt
clang:openbsd:amd64

00:04:20

passed #1671913
amd64 linux
clang:tsan

00:02:17

passed #1671899
amd64 linux
gcc:alpine3.13:amd64

00:01:53

passed #1671910
amd64 linux
gcc:asan

00:03:22

passed #1671903
amd64 linux
gcc:buster:amd64

00:01:25

passed #1671900
amd64 linux
gcc:centos7:amd64

00:01:30

passed #1671901
amd64 linux
gcc:centos8:amd64

00:01:41

passed #1671909
amd64 linux
gcc:focal:amd64

00:01:43

passed #1671914
amd64 linux
gcc:mutexatomics

00:01:40

passed #1671905
amd64 linux
gcc:out-of-tree

00:01:32

passed #1671904
amd64 linux
gcc:sid:amd64

00:02:12

passed #1671906
i386 linux
gcc:sid:i386

00:01:49

passed #1671916
amd64 linux
gcc:softhsm2.4

00:01:44

passed #1671917
amd64 linux
gcc:softhsm2.6

00:01:35

passed #1671902
amd64 linux
gcc:stretch:amd64

00:01:54

passed #1671912
amd64 linux
gcc:tsan

00:01:53

passed #1671907
amd64 linux
gcc:tumbleweed:amd64

00:01:40

passed #1671908
amd64 linux
gcc:xenial:amd64

00:01:57

passed #1671922
amd64 windows
msvc:windows:amd64

00:00:57

passed #1671921
amd64 linux
nolibtool:sid:amd64

00:01:53

 
  Unit
passed #1671934
amd64 linux
unit:clang:asan

00:01:09

passed #1671938
amd64 linux
unit:clang:buster:amd64

00:00:38

passed #1671941
amd64 libvirt
unit:clang:freebsd11:amd64

00:01:13

canceled #1671942
amd64 libvirt
unit:clang:freebsd12:amd64

00:03:21

passed #1671936
amd64 linux
unit:clang:tsan

00:01:29

passed #1671923
amd64 linux
unit:gcc:alpine3.13:amd64

00:00:51

passed #1671933
amd64 linux
unit:gcc:asan

00:01:08

passed #1671927
amd64 linux
unit:gcc:buster:amd64

00:00:56

passed #1671924
amd64 linux
unit:gcc:centos7:amd64

00:00:37

passed #1671925
amd64 linux
unit:gcc:centos8:amd64

00:00:44

passed #1671932
amd64 linux
unit:gcc:focal:amd64

00:00:39

passed #1671937
amd64 linux
unit:gcc:mutexatomics

00:00:42

passed #1671928
amd64 linux
unit:gcc:sid:amd64

00:00:42

passed #1671929
i386 linux
unit:gcc:sid:i386

00:00:48

passed #1671939
amd64 linux
unit:gcc:softhsm2.4

00:00:39

passed #1671940
amd64 linux
unit:gcc:softhsm2.6

00:00:40

passed #1671926
amd64 linux
unit:gcc:stretch:amd64

00:00:41

passed #1671935
amd64 linux
unit:gcc:tsan

00:01:46

passed #1671930
amd64 linux
unit:gcc:tumbleweed:amd64

00:00:41

passed #1671931
amd64 linux
unit:gcc:xenial:amd64

00:00:41

passed #1671943
amd64 linux
unit:nolibtool:sid:amd64

00:00:58

 
  System
canceled #1671955
amd64 linux
system:clang:asan

00:01:22

canceled #1671959
amd64 linux
system:clang:buster:amd64

00:02:49

canceled #1671962
amd64 libvirt
system:clang:freebsd11:amd64

00:03:19

canceled #1671963
amd64 libvirt
system:clang:freebsd12:amd64

00:03:19

canceled #1671957
amd64 linux
system:clang:tsan

00:02:49

canceled #1671944
amd64 linux
system:gcc:alpine3.13:amd64

00:03:24

canceled #1671954
amd64 linux
system:gcc:asan

00:01:52

canceled #1671948
amd64 linux
system:gcc:buster:amd64

00:02:51

canceled #1671945
amd64 linux
system:gcc:centos7:amd64

00:03:47

canceled #1671946
amd64 linux
system:gcc:centos8:amd64

00:03:34

canceled #1671953
amd64 linux
system:gcc:focal:amd64

00:03:30

canceled #1671958
amd64 linux
system:gcc:mutexatomics

00:03:29

canceled #1671949
amd64 linux
system:gcc:sid:amd64

00:03:01

canceled #1671950
i386 linux
system:gcc:sid:i386

00:03:22

canceled #1671960
amd64 linux
system:gcc:softhsm2.4

00:03:32

canceled #1671961
amd64 linux
system:gcc:softhsm2.6

00:03:41

canceled #1671947
amd64 linux
system:gcc:stretch:amd64

00:03:21

canceled #1671956
amd64 linux
system:gcc:tsan

00:02:56

canceled #1671951
amd64 linux
system:gcc:tumbleweed:amd64

00:03:33

canceled #1671952
amd64 linux
system:gcc:xenial:amd64

00:02:56

canceled #1671964
amd64 linux
system:nolibtool:sid:amd64

00:02:47

 
  Docs
passed #1671965
amd64 linux
docs

00:02:22

 
  Postcheck
passed #1671969
amd64 linux
cppcheck

00:00:22

passed #1671966
amd64 linux
flake8

00:00:19

canceled #1671970
amd64 linux
gcov

passed #1671967
amd64 linux
pylint

00:00:27

canceled #1671968
amd64 linux
scan-build

00:05:09