mysql-test/r/partition.result:
  New test cases
mysql-test/r/partition_02myisam.result:
  ENGINE always specified per partition in show table
mysql-test/t/partition.test:
  New test cases
sql/partition_element.h:
  New copy constructor for partition_element
sql/partition_info.cc:
  Use new copy constructor to ensure default subpartitions inherit partition options from parent
  Ensure engine is always set on both partitions and subpartitions
sql/sql_partition.cc:
  Removed unneeded bool to generate_partition_syntax
  Write partition options also for subpartitioned tables when subpartitioning is by default
  Set up defaults for new partitions also in REORGANIZE PARTITION
sql/sql_partition.h:
  Removed unneeded parameter to generate_partition_syntax call
sql/sql_show.cc:
  Removed unneeded parameter to generate_partition_syntax call
sql/sql_table.cc:
  Removed unneeded parameter to generate_partition_syntax call