The previous variant where it was a specific ha_partition method
only worked for the partition handler. It was unfortunately called also
for the NDB handler and in this case it called a random method in the
NDB handler with random input.


sql/ha_ndbcluster.cc:
  Moved initialisation of some handler variables to
  set_part_info method called earlly in the open process
sql/ha_ndbcluster.h:
  Moved initialisation of some handler variables to
  set_part_info method called earlly in the open process
sql/ha_partition.h:
  Made set_part_info a handler method and not a ha_partition method only
sql/handler.h:
  Made set_part_info a handler method and not a ha_partition method only
sql/sql_partition.cc:
  Made set_part_info a handler method and not a ha_partition method only