Use distinct schema in tests having table name collisions

Co-authored-by: NAsim R P <apraveen@pivotal.io>
Co-authored-by: NTaylor Vesely <tvesely@pivotal.io>

src/test/regress/expected/olap_window_seq.out

@@ -7369,7 +7369,7 @@ create view v1 as
 select dt, sum(cn) over(order by grouping(cn) range grouping(cn) preceding) 
 from sale group by rollup(cn,dt);
 \d+ v1
-                  View "public.v1"
+              View "olap_window_seq.v1"
  Column |  Type  | Modifiers | Storage | Description 
 --------+--------+-----------+---------+-------------
  dt     | date   |           | plain   | 

src/test/regress/expected/olap_window_seq_optimizer.out

@@ -7371,7 +7371,7 @@ create view v1 as
 select dt, sum(cn) over(order by grouping(cn) range grouping(cn) preceding) 
 from sale group by rollup(cn,dt);
 \d+ v1
-                  View "public.v1"
+              View "olap_window_seq.v1"
  Column |  Type  | Modifiers | Storage | Description 
 --------+--------+-----------+---------+-------------
  dt     | date   |           | plain   | 

src/test/regress/sql/olap_window_seq.sql

@@ -3,6 +3,11 @@
 --
 -- Changes here should also be made to olap_window_seq.sql
 
+-- start_ignore
+create schema olap_window_seq;
+set search_path to olap_window_seq, public;
+-- end_ignore
+
 ---- 1 -- Null window specification -- OVER () ----
 
 select row_number() over (), cn,pn,vn 

src/test/regress/sql/rangefuncs_cdb.sql

 SELECT name, setting FROM pg_settings WHERE name LIKE 'enable%';
+-- start_ignore
+create schema rangefuns_cdb;
+set search_path to rangefuncs_cdb, public;
+-- end_ignore
 
 DROP TABLE IF EXISTS foo;