Correct memory calculation in Serialize.
  Correct some UDF's messages.
  Add and modify the json tests
removed:
  storage/connect/mysql-test/connect/std_data/biblio.jsn
  storage/connect/mysql-test/connect/std_data/expense.jsn
  storage/connect/mysql-test/connect/std_data/mulexp3.jsn
  storage/connect/mysql-test/connect/std_data/mulexp4.jsn
  storage/connect/mysql-test/connect/std_data/mulexp5.jsn
added:
  storage/connect/mysql-test/connect/r/json_udf.result
  storage/connect/mysql-test/connect/std_data/biblio.json
  storage/connect/mysql-test/connect/std_data/expense.json
  storage/connect/mysql-test/connect/std_data/mulexp3.json
  storage/connect/mysql-test/connect/std_data/mulexp4.json
  storage/connect/mysql-test/connect/std_data/mulexp5.json
  storage/connect/mysql-test/connect/t/json_udf.test
modified:
  storage/connect/json.cpp
  storage/connect/jsonudf.cpp
  storage/connect/mysql-test/connect/r/json.result
  storage/connect/mysql-test/connect/t/json.test