fix numbering of tests and make consistent

7 jobs for 166-statistics-system-test-numbering-is-bad in 6 minutes and 32 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Precheck
passed #5245
linux docker
precheck:debian:sid:amd64

00:00:10

 
  Build
passed #5246
linux docker
build:debian:sid:amd64

00:01:33

passed #5247
linux docker
build:debian:sid:i386

00:01:41

 
  Test
passed #5250
linux docker
systemtest:debian:sid:amd64

00:04:38

passed #5251
linux docker
systemtest:debian:sid:i386

00:04:39

passed #5248
linux docker
unittest:debian:sid:amd64

00:00:46

passed #5249
linux docker
unittest:debian:sid:i386

00:00:47