mysql-test/r/partition.result:
  Removed test case no longer supported
mysql-test/r/partition_error.result:
  Changed behaviour of test case
mysql-test/r/partition_pruning.result:
  Changed behaviour of test case
mysql-test/t/partition.test:
  Changed behaviour of test case
mysql-test/t/partition_error.test:
  Changed behaviour of test case
mysql-test/t/partition_pruning.test:
  Changed behaviour of test case
sql/sql_partition.cc:
  Ensured PARTITION BY KEY can use any column type