Add migration pre-check and plugin db check util
Add migration pre-check and plugin db check util

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