Removed warnings from mysqltest scripts


cmd-line-utils/readline/undo.c:
  Fixed portability problem
mysql-test/include/mix2.inc:
  Removed mysqltest warnings
mysql-test/include/query_cache.inc:
  Removed mysqltest warnings
mysql-test/r/ndb_binlog_ddl_multi.result:
  Update tests after fixing wrong connection command in test
mysql-test/t/greedy_optimizer.test:
  Removed mysqltest warnings
mysql-test/t/join.test:
  Removed mysqltest warnings
mysql-test/t/ndb_binlog_ddl_multi.test:
  Removed mysqltest warnings
mysql-test/t/ndb_blob_partition.test:
  Removed mysqltest warnings
mysql-test/t/ndb_index_ordered.test:
  Removed mysqltest warnings
storage/ndb/src/kernel/vm/Rope.cpp:
  Removed compiler warning