modified update_db to support the new interface
modified update_db to support the new interface

rosedu/vmchecker,cojocar/vmchecker,calin-iorgulescu/vmchecker,rosedu/vmchecker,cojocar/vmchecker,calin-iorgulescu/vmchecker,rosedu/vmchecker,calin-iorgulescu/vmchecker,cojocar/vmchecker,cojocar/vmchecker,calin-iorgulescu/vmchecker,rosedu/vmchecker,calin-iorgulescu/vmchecker,rosedu/vmchecker,cojocar/vmchecker,cojocar/vmchecker,calin-iorgulescu/vmchecker,rosedu/vmchecker