[CBRD-24544] not allow to alter the column type to a type that does not support auto-increment.

[beyondykk9]

http://jira.cubrid.org/browse/CBRD-24544

In DB table, the column type can be altered to any DB type, however, if the column has an auto-increment attribute the type altering should be checked severly not to allow non numeric type.

CREATE a_tbl (a int AUTO_INCREMENT, b VARCHAR);
ALTER TABLE a_tbl MODIFY COLUMN a VARCHAR;

The above "ALTER" command must not be allowed because the auto-increment doesn't work properly.

If the auto-increment column type is overflown as altering the type, the ALTER command results error as following message:

ERROR: Start value of an auto increment constraint should be less then max value.

Example:

CREATE TABLE a_tbl (a INT AUTO_INCREMENT (1, 1000000000), b INT);
INSERT INTO a_tbl (b) VALUES (1);
INSERT INTO a_tbl (b) VALUES (2);
ALTER TABLE a_tbl MODIFY COLUMN a SHORT;

ERROR: Start value of an auto increment constraint should be less then max value. 

[beyondykk9]

The failed Test cases should be modified as changed specification for modifying column type having auto-increment attribute.