Bugs fixed:
- prepare_for_repair() didn't close all open files if table opened failed
  because of out-of-memory
- If dd_recreate_table() failed, the data file was not properly restored
  from it's temporary name
- Aria repair initializing code didn't properly clear all used structs
  before calling error, which caused crashed in memory-free calls.
- maria_delete_table() didn't register if table open failed. This could
  calls my_error() to be called without returning 1 to the caller, which
  cased failures in my_ok()

Note when merging to 10.5:
- Remove the #if MYSQL_VERSION from sql_admin.cc