- Added support for creating and managing the Session Temporary Tablespace
  pool. The temporary tablespaces in this pool will be used to store
  all the user temporary tables as well as optimizer internal temporary
  tables
- Added support to reclaim the disk space occupied by the user and
  optimizer internal temporary tables on a session disconnect
- Added new server option innodb_temp_tablespaces_dir to specify the
  the directory to hold the session temporary tablespaces
- Added a new table INFORMATION_SCHEMA.INNODB_SESSION_TEMP_TABLESPACES
  to track the usage of the session temporary tablespaces
- Added deprecation warnings for TABLESPACE=innodb_file_per_table and
  TABLESPACE=innodb_temporary phrases while creating a temporary table
  using CREATE TEMPORARY TABLE statement

Reviewed by: Kevin Lewis <kevin.lewis@oracle.com>
             Annamalai Gurusami <annamalai.gurusami@oracle.com>

RB: 19798