Fix tests for postgres with version >= 10

Author: ildus

expected/pathman_basic_1.out

@@ -1438,16 +1438,16 @@ INSERT INTO test.range_rel (dt) VALUES ('2015-06-01');
  */
 ALTER TABLE test.range_rel DROP COLUMN data;
 SELECT * FROM pathman.pathman_config;
-    partrel     | expr | parttype | range_interval |                                                       cooked_expr                                                       
-----------------+------+----------+----------------+-------------------------------------------------------------------------------------------------------------------------
- test.range_rel | dt   |        2 | @ 10 days      | {VAR :varno 1 :varattno 2 :vartype 1114 :vartypmod -1 :varcollid 0 :varlevelsup 0 :varnoold 1 :varoattno 2 :location 8}
+    partrel     | expr | parttype | range_interval 
+----------------+------+----------+----------------
+ test.range_rel | dt   |        2 | @ 10 days
 (1 row)
 
 DROP TABLE test.range_rel CASCADE;
 NOTICE:  drop cascades to 21 other objects
 SELECT * FROM pathman.pathman_config;
- partrel | expr | parttype | range_interval | cooked_expr 
----------+------+----------+----------------+-------------
+ partrel | expr | parttype | range_interval 
+---------+------+----------+----------------
 (0 rows)
 
 /* Check overlaps */
@@ -1544,9 +1544,9 @@ SELECT pathman.split_range_partition('test."RangeRel_1"', '2015-01-01'::DATE);
 DROP TABLE test."RangeRel" CASCADE;
 NOTICE:  drop cascades to 6 other objects
 SELECT * FROM pathman.pathman_config;
-      partrel       | expr | parttype | range_interval |                                                      cooked_expr                                                      
---------------------+------+----------+----------------+-----------------------------------------------------------------------------------------------------------------------
- test.num_range_rel | id   |        2 | 1000           | {VAR :varno 1 :varattno 1 :vartype 23 :vartypmod -1 :varcollid 0 :varlevelsup 0 :varnoold 1 :varoattno 1 :location 8}
+      partrel       | expr | parttype | range_interval 
+--------------------+------+----------+----------------
+ test.num_range_rel | id   |        2 | 1000
 (1 row)
 
 CREATE TABLE test."RangeRel" (