s3ext: speedup regression testing

update the case which reads 5120 small files to read 2001 files.

gpAux/extensions/gps3ext/regress/gpcheckcloud_regress.sh

@@ -34,7 +34,7 @@ CHECK_CASES=(
 # huge files
 "s3://s3-us-west-2.amazonaws.com/s3test.pivotal.io/regress/hugefile/airlinedata1.csv f5811ad92c994f1d6913d5338575fe38"
 "s3://s3-us-west-2.amazonaws.com/s3test.pivotal.io/regress/gzipped_normal2/ a930794bc885bccf6eed45bd40367a7d"
-"s3://s3-us-west-2.amazonaws.com/s3test.pivotal.io/regress/5120files/ 71277a7004842241191cc65146be24f6"
+"s3://s3-us-west-2.amazonaws.com/s3test.pivotal.io/regress/2001files/ 38c18f5ddf9ef68fef9ef9842c2aa180"
 )
 
 for ((i=0; i<${#CHECK_CASES[@]}; i++))

gpAux/extensions/gps3ext/regress/input/1_14_thousands_of_files.source

@@ -8,7 +8,7 @@ CREATE PROTOCOL s3 (
 DROP EXTERNAL TABLE s3regress;
 
 CREATE READABLE EXTERNAL TABLE s3regress (date text, time text, open float, high float,
-        low float, volume int) LOCATION('s3://s3-us-west-2.amazonaws.com/@read_prefix@/5120files/ config=@config_file@') FORMAT 'csv';
+        low float, volume int) LOCATION('s3://s3-us-west-2.amazonaws.com/@read_prefix@/2001files/ config=@config_file@') FORMAT 'csv';
 
 SELECT count(*) count, round(sum(open)) sum, round(avg(open)) avg FROM s3regress;
 

gpAux/extensions/gps3ext/regress/output/1_14_thousands_of_files.source

@@ -6,11 +6,11 @@ CREATE PROTOCOL s3 (
 DROP EXTERNAL TABLE s3regress;
 ERROR:  table "s3regress" does not exist
 CREATE READABLE EXTERNAL TABLE s3regress (date text, time text, open float, high float,
-        low float, volume int) LOCATION('s3://s3-us-west-2.amazonaws.com/@read_prefix@/5120files/ config=@config_file@') FORMAT 'csv';
+        low float, volume int) LOCATION('s3://s3-us-west-2.amazonaws.com/@read_prefix@/2001files/ config=@config_file@') FORMAT 'csv';
 SELECT count(*) count, round(sum(open)) sum, round(avg(open)) avg FROM s3regress;
- count  |   sum    | avg 
---------+----------+-----
- 655360 | 23302752 |  36
+ count  |   sum   | avg 
+--------+---------+-----
+ 256128 | 9107189 |  36
 (1 row)
 
 DROP EXTERNAL TABLE s3regress;