In this WL, the default row format of all InnoDB tables is changed from
COMPACT to DYNAMIC. A new option "innodb_default_row_format" is
introduced with default as "DYNAMIC".

The valid option values are REDUNDANT, COMPACT & DYNAMIC.

Intrinsic temporary tables will always use DYNAMIC row format.

Initial patch written by Marko Makela.

Reviewed-by: Krunal Bauskar <krunal.bauskar@oracle.com>
Reviewed-by: Jimmy Yang <jimmy.yang@oracle.com>
RB: 9703