Fix for MongoCollection::group() $options warning
Fix for MongoCollection::group() $options warning

Open343/elefant,AxorB/elefant,R-J/elefant,Open343/elefant,twheel/elefant,R-J/elefant,evan70/elefant,jbroadway/elefant,jbroadway/elefant,twheel/elefant,jbroadway/elefant,AxorB/elefant,evan70/elefant,evan70/elefant,AxorB/elefant,Open343/elefant,R-J/elefant,jbroadway/elefant,twheel/elefant