Fixed warnings from test suite
Some fixes in mysql-test-run script to catch more warnings


mysql-test/lib/mtr_report.pl:
  Catch more warnings
mysql-test/mysql-test-run.sh:
  Catch warnings from mysqld
mysql-test/t/mysqldump.test:
  Add key_block_size to catch future changes in information schema
mysys/errors.c:
  Ensure that mysql-test-run catches if we call my_close() too many times
sql/handler.cc:
  Initialize all elements
sql/log.cc:
  true -> TRUE
sql/sql_class.h:
  Review change: key_info -> key_create_info
sql/sql_lex.h:
  Review change: key_info -> key_create_info
sql/sql_table.cc:
  Review change: key_info -> key_create_info
  Don't call mysql_close() if init_ddl_log is not called.
  Better error handling in init_ddl_log
sql/sql_yacc.yy:
  Review change: key_info -> key_create_info