change default cluster position from 0,0,0 to -1,-1,-1 like in AliEMCALRecPoints, avoid problems when calculating the cluster momentum for null vertex case; move method comment avobe the method with doxygen format
change default cluster position from 0,0,0 to -1,-1,-1 like in AliEMCALRecPoints, avoid problems when calculating the cluster momentum for null vertex case; move method comment avobe the method with doxygen format

mkrzewic/AliRoot,jgrosseo/AliRoot,ALICEHLT/AliRoot,sebaleh/AliRoot,miranov25/AliRoot,coppedis/AliRoot,alisw/AliRoot,alisw/AliRoot,ecalvovi/AliRoot,ALICEHLT/AliRoot,alisw/AliRoot,coppedis/AliRoot,ALICEHLT/AliRoot,sebaleh/AliRoot,miranov25/AliRoot,sebaleh/AliRoot,jgrosseo/AliRoot,miranov25/AliRoot,ALICEHLT/AliRoot,mkrzewic/AliRoot,shahor02/AliRoot,sebaleh/AliRoot,ALICEHLT/AliRoot,shahor02/AliRoot,ALICEHLT/AliRoot,coppedis/AliRoot,miranov25/AliRoot,coppedis/AliRoot,mkrzewic/AliRoot,alisw/AliRoot,miranov25/AliRoot,alisw/AliRoot,shahor02/AliRoot,mkrzewic/AliRoot,miranov25/AliRoot,ecalvovi/AliRoot,ecalvovi/AliRoot,shahor02/AliRoot,jgrosseo/AliRoot,sebaleh/AliRoot,coppedis/AliRoot,miranov25/AliRoot,ecalvovi/AliRoot,sebaleh/AliRoot,coppedis/AliRoot,shahor02/AliRoot,mkrzewic/AliRoot,alisw/AliRoot,jgrosseo/AliRoot,coppedis/AliRoot,coppedis/AliRoot,shahor02/AliRoot,jgrosseo/AliRoot,jgrosseo/AliRoot,mkrzewic/AliRoot,jgrosseo/AliRoot,alisw/AliRoot,alisw/AliRoot,miranov25/AliRoot,ALICEHLT/AliRoot,sebaleh/AliRoot,shahor02/AliRoot,mkrzewic/AliRoot,ecalvovi/AliRoot,ecalvovi/AliRoot,ecalvovi/AliRoot