tests: ensure multinode mixin correctly for multinode docker test shell.

Signed-off-by: Larry Shen <larry.shen@nxp.com>
16 jobs for docker_test_shell_multinode in 16 minutes and 3 seconds (queued for 5 seconds)
Status Name Job ID Coverage
  Test
passed dispatcher-debian-10 #131121
amd64

00:02:27

passed dispatcher-debian-11 #131123
amd64

00:02:29

passed server-debian-10 #131122
amd64

00:02:53

passed server-debian-11 #131124
amd64

00:05:04

 
  Analyze
passed bandit-sast #131125
amd64-dind

00:00:55

passed black #131126
amd64

00:00:36

passed code_quality #131127
amd64

00:00:20

passed codespell #131132
amd64

00:00:18

passed coverage #131128
amd64

00:06:43

61.07%
passed dockerfiles #131129
amd64

00:00:15

passed pylint #131131
amd64

00:03:05

passed schemas #131130
amd64

00:00:30

 
  Build
passed debian/10 #131134
amd64

00:01:25

passed doc #131133
amd64

00:00:38

passed docker-amd64-dispatcher #131135
amd64-dind

00:04:06

passed docker-amd64-server #131136
amd64-dind

00:04:10