A NEW BACTERIAL STRAIN WEISSELLA CIBARIA, A COMPOSITION COMPRISING IT, A PHARMACEUTICAL COMPOSITION FOR USE, A DIETARY SUPPLEMENT, A PROBIOTIC PREPARATION, A BACTERIAL STARTER CULTURE FOR MAKING BREAD, SOURDOUGH, BREAD, A METHOD FOR THE PRODUCTION OF BREAD, A METHOD FOR MICROBIOLOGICAL PRODUCTION OF DEXTRAN, A BACTERIAL PREPARATION AND APPLICATIONS USING THIS STRAIN