Bug#20129: ALTER TABLE ... REPAIR PARTITION ... complains that

partition is corrupt

Updated result files after merge

mysql-test/suite/parts/r/partition_alter1_1_2_innodb.result:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... complains that
  partition is corrupt
  
  Updated result file after merge
mysql-test/suite/parts/t/disabled.def:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... complains that
  partition is corrupt
  
  Enabled two tests after fixing the bug.

mysql-test/suite/parts/t/disabled.def

@@ -7,5 +7,3 @@ partition_syntax_ndb           : Bug#36735 Not supported
 partition_value_innodb         : Bug#30581 partition_value tests use disallowed CAST() function
 partition_value_myisam         : Bug#30581 partition_value tests use disallowed CAST() function
 partition_value_ndb            : Bug#30581 partition_value tests use disallowed CAST() function
-partition_alter4_myisam        : Bug#20129 / WL#4176
-partition_alter4_innodb        : Bug#20129 / WL#4176