Problem:
========
With current InnoDB tablespace implementation with newDD, the implicit
(file-per-table) tablespace name is named as "innodb_file_per_table_x", where x
is the tablespace ID. The disadvantage of this is that the tablespace name is hard for
user to find out. This makes it a bit harder for user to specify tablespace name
for import/export tablespace etc.

Solution:
========
In case of file_per_table tablespace, rename tablespace name from
innodb_file_per_table_<space_id> to tablespace name in mysql.tablespaces table.

Reviewed-by: Jimmy Yang <jimmy.yang@oracle.com>
Reviewed-by: Bin Su <bin.x.su@oracle.com>
Reviewed-by: Dyre Tjeldvoll <dyre.tjeldvoll@oracle.com>
RB: 16669