Handle plugins in `indico db prepare`
Handle plugins in `indico db prepare`

It is kind of ugly that we need to deal with plugins there but there's
no good way to get rid of them.

ThiefMaster/indico,mvidalgarcia/indico,pferreir/indico,pferreir/indico,DirkHoffmann/indico,indico/indico,DirkHoffmann/indico,mvidalgarcia/indico,DirkHoffmann/indico,OmeGak/indico,indico/indico,OmeGak/indico,pferreir/indico,indico/indico,OmeGak/indico,indico/indico,ThiefMaster/indico,mvidalgarcia/indico,mvidalgarcia/indico,ThiefMaster/indico,mic4ael/indico,ThiefMaster/indico,mic4ael/indico,pferreir/indico,mic4ael/indico,mic4ael/indico,DirkHoffmann/indico,OmeGak/indico