Fix running setup_manticore twice
Fix running setup_manticore twice

If the search daemon is already running, the command
"indexer --all" will fail. This commit prevents the
indexation from failing if setup_manticore has been
already run before.

Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2