Fix a bug in the Runtime tests
Fix a bug in the Runtime tests

A group name was erroneusly inserted in the list of user names.

Signed-off-by: Michele Tartara <05f7077a2c6cbbdc4af4ba42e3ef89a0df846179@google.com>
Reviewed-by: Guido Trotter <f62ca4d5358bdaeef0e50e57f9f7e231de63727e@google.com>

dimara/ganeti,apyrgio/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,grnet/snf-ganeti,bitemyapp/ganeti,bitemyapp/ganeti,andir/ganeti,yiannist/ganeti,leshchevds/ganeti,ganeti/ganeti,grnet/snf-ganeti,andir/ganeti,ganeti/ganeti,leshchevds/ganeti,apyrgio/snf-ganeti,andir/ganeti,mbakke/ganeti,mbakke/ganeti,yiannist/ganeti,mbakke/ganeti,leshchevds/ganeti,yiannist/ganeti,dimara/ganeti,apyrgio/ganeti,ganeti-github-testing/ganeti-test-1,apyrgio/snf-ganeti,onponomarev/ganeti,onponomarev/ganeti