Mongo v4.0.1 support

Version v4.0.1

#10 Command ping was removed from mongo:lastest image, so all variables in script will not work.
#14 During run of mongo-cnf-x it seems to be invalid rest option.
#15 Support for replication protocol version 0 was removed in MongoDB 4.0.
#16 MongoDB 4.0, you cannot specify --nojournal in replica set on wiredTiger engine
#11 Update to latest stable mongo