- move scripts from test/units/ to the test specific units directory,
- drop meaningless true from silent-success.service,
- call journalctl from the same bash invocation of echo.
No functional change, just refactoring and preparation for the next
commit.
Having these named differently than the test itself mostly creates
unecessary confusion and makes writing logic against the tests harder
so let's rename the testsuite-xx units and scripts to just use the
test name itself.