Moved the InnoDB related test from func_group.test to innodb_mysql.test


mysql-test/r/func_group.result:
  Moved a test to innodb_mysql
mysql-test/r/innodb_mysql.result:
  moved a test to innodb_mysql
mysql-test/t/func_group.test:
  Moved a test to innodb_mysql
mysql-test/t/innodb_mysql.test:
  Moved a test to innodb_mysql