Update live-test.sh w.r.t. simulation mode changes
Update live-test.sh w.r.t. simulation mode changes

Commit 6c7448bb changed the syntax for the --simulation option, but
didn't update live-test for it.

Signed-off-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>
Reviewed-by: Adeodato Simo <16293852a0900193fe70fa7d24f714f37ba99a56@google.com>

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