testsuite: better test result name for SR egg test
https://lab.nexedi.com/nexedi/slapos/tree/master/software/proftpd/test was just named "test", we want the test result to be named "proftpd" instead.
https://lab.nexedi.com/nexedi/slapos/tree/master/software/proftpd/test was just named "test", we want the test result to be named "proftpd" instead.