Added test case to check the default value of @@binlog_format.
mysql-test/t/binlog_format_basic.test:
Added test case to verify the default binlog_format: it should be
STATEMENT in 5.1 and MIXED in 6.0.
- Updated slow_query_log_file_basic and general_log_file basis instead of the func version as
the func version run good but the basic versions fail.
- Sent innodb.test to dev@innodb.com.
- variables.test has differences probably due to a bug in mtr or in the SET statement (see bug#39369).
- general_log_file_basic.test and slow_query_log_file_bsaic.test have differences, which might be
produced by the new mtr (see bug#38124).
