Remove redundant TINC tests on serial and bigserial types.

Serial and bigserial are just aliases for int4 and int8, respectively,
with a DEFAULT (nextval(seq)). The boundary tests are there for redundant
with the boundary tests on int8, in the 'int8' test in the main suite, and
the 'dml_serial' is redundant with the tests on serial datatype in the
'sequence' test in the main suite.

src/test/tinc/tincrepo/dml/functional/expected/dml_boundary_bigserial.ans

--- @author prabhd 
--- @created 2012-12-05 12:00:00 
--- @modified 2012-12-05 12:00:00 
--- @tags dml 
--- @db_name dmldb
--- @description test: Boundary test for bigserial
-DROP TABLE IF EXISTS dml_bigserial;
-DROP TABLE
-CREATE TABLE dml_bigserial (a bigserial) distributed by (a);
-HINT:  The 'DISTRIBUTED BY' clause determines the distribution of data. Make sure column(s) chosen are the optimal data distribution key to minimize skew.
-CREATE TABLE
--- Simple DML
-INSERT INTO dml_bigserial VALUES(9223372036854775807);
-INSERT 0 1
-SELECT * FROM dml_bigserial ORDER BY 1;
-          a          
----------------------
- 9223372036854775807
-(1 row)
-
-INSERT INTO dml_bigserial VALUES(0);
-INSERT 0 1
-SELECT * FROM dml_bigserial ORDER BY 1;
-          a          
----------------------
-                   0
- 9223372036854775807
-(2 rows)
-
-UPDATE dml_bigserial SET a = 9223372036854775807;
-UPDATE 2
-SELECT * FROM dml_bigserial ORDER BY 1;
-          a          
----------------------
- 9223372036854775807
- 9223372036854775807
-(2 rows)
-
-UPDATE dml_bigserial SET a = 0;
-UPDATE 2
-SELECT * FROM dml_bigserial ORDER BY 1;
- a 
----
- 0
- 0
-(2 rows)
-
--- OUT OF RANGE
-INSERT INTO dml_bigserial VALUES(9223372036854775808);
-psql:dml_boundary_bigserial.sql:22: ERROR:  bigint out of range
-SELECT * FROM dml_bigserial ORDER BY 1;
- a 
----
- 0
- 0
-(2 rows)
-
-UPDATE dml_bigserial SET a = 9223372036854775808;
-psql:dml_boundary_bigserial.sql:24: ERROR:  bigint out of range
-SELECT * FROM dml_bigserial ORDER BY 1;
- a 
----
- 0
- 0
-(2 rows)
-

src/test/tinc/tincrepo/dml/functional/expected/dml_serial.ans

--- @author prabhd
--- @created 2012-12-05 12:00:00
--- @modified 2012-12-05 12:00:00
--- @tags dml
--- @db_name dmldb
--- @description test: Boundary test for serial
-DROP SEQUENCE IF EXISTS serial;
-DROP SEQUENCE
-CREATE SEQUENCE serial START 101;
-CREATE SEQUENCE
-DROP TABLE IF EXISTS dml_serial;
-DROP TABLE
-CREATE TABLE dml_serial(a serial) distributed by (a);
-psql:dml_serial.sql:5: NOTICE:  CREATE TABLE will create implicit sequence "dml_serial_a_seq" for serial column "dml_serial.a"
-CREATE TABLE
-INSERT INTO dml_serial VALUES (nextval('serial'));
-INSERT 0 1
-INSERT INTO dml_serial VALUES (nextval('serial'));
-INSERT 0 1
-SELECT * FROM dml_serial ORDER BY 1;
-  a  
------
- 101
- 102
-(2 rows)
-
-UPDATE dml_serial set a = nextval('serial');
-UPDATE 2
-SELECT * FROM dml_serial ORDER BY 1;
-  a  
------
- 103
- 104
-(2 rows)
-
-UPDATE dml_serial set a = nextval('serial');
-UPDATE 2
-SELECT * FROM dml_serial ORDER BY 1;
-  a  
------
- 105
- 106
-(2 rows)
-

src/test/tinc/tincrepo/dml/functional/sql/dml_boundary_bigserial.sql

--- @author prabhd 
--- @created 2012-12-05 12:00:00 
--- @modified 2012-12-05 12:00:00 
--- @tags dml 
--- @db_name dmldb
--- @description test: Boundary test for bigserial
-\echo --start_ignore
-set gp_enable_column_oriented_table=on;
-\echo --end_ignore
-
-DROP TABLE IF EXISTS dml_bigserial;
-CREATE TABLE dml_bigserial (a bigserial) distributed by (a);
-
--- Simple DML
-INSERT INTO dml_bigserial VALUES(9223372036854775807);
-SELECT * FROM dml_bigserial ORDER BY 1;
-INSERT INTO dml_bigserial VALUES(0);
-SELECT * FROM dml_bigserial ORDER BY 1;
-UPDATE dml_bigserial SET a = 9223372036854775807;
-SELECT * FROM dml_bigserial ORDER BY 1;
-UPDATE dml_bigserial SET a = 0;
-SELECT * FROM dml_bigserial ORDER BY 1;
-
--- OUT OF RANGE
-INSERT INTO dml_bigserial VALUES(9223372036854775808);
-SELECT * FROM dml_bigserial ORDER BY 1;
-UPDATE dml_bigserial SET a = 9223372036854775808;
-SELECT * FROM dml_bigserial ORDER BY 1;
-
-

src/test/tinc/tincrepo/dml/functional/sql/dml_serial.sql

--- @author prabhd
--- @created 2012-12-05 12:00:00
--- @modified 2012-12-05 12:00:00
--- @tags dml
--- @db_name dmldb
--- @description test: Boundary test for serial
-\echo --start_ignore
-set gp_enable_column_oriented_table=on;
-\echo --end_ignore
-DROP SEQUENCE IF EXISTS serial;
-CREATE SEQUENCE serial START 101;
-
-DROP TABLE IF EXISTS dml_serial;
-CREATE TABLE dml_serial(a serial) distributed by (a);
-
-INSERT INTO dml_serial VALUES (nextval('serial'));
-INSERT INTO dml_serial VALUES (nextval('serial'));
-
-SELECT * FROM dml_serial ORDER BY 1;
-UPDATE dml_serial set a = nextval('serial');
-
-SELECT * FROM dml_serial ORDER BY 1;
-
-UPDATE dml_serial set a = nextval('serial');
-
-SELECT * FROM dml_serial ORDER BY 1;