tests: clean up and restruct account name tests

Signed-off-by: 35V LG84 <35vlg84-x4e6b92@e257.fi>
2 jobs for tep/tep-1008-num-acc-names in 5 minutes and 15 seconds
Status Job ID Name Coverage
  Test
passed #178338739
test·jdk11

00:04:29

passed #178338740
test·jdk8

00:05:15

99.77%