Reduce a test so that it fails less frequently on buildbot

There is an inherent race condition between Mariabackup and the
MariaDB server when the InnoDB redo log is being copied. It is
possible that the tail of the circular redo log is overwriting
the head of the log before Mariabackup gets a chance to read it.
So, we reduce the test to generate less redo log. Also, enable
the test on all supported innodb_page_size.

mysql-test/suite/mariabackup/xb_compressed_encrypted.result

-CREATE TABLE t1(c1 INT, b VARCHAR(2400), index(b(100),c1)) ENGINE=INNODB ROW_FORMAT=compressed ENCRYPTED=YES;
-CREATE PROCEDURE innodb_insert_proc (REPEAT_COUNT INT)
-BEGIN
-DECLARE CURRENT_NUM INT;
-SET CURRENT_NUM = 0;
-WHILE CURRENT_NUM < REPEAT_COUNT DO
-INSERT INTO t1 VALUES(CURRENT_NUM, concat(uuid(), CURRENT_NUM, repeat('ab', floor(rand()*100) ), uuid()));
-SET CURRENT_NUM = CURRENT_NUM + 1;
-END WHILE;
-END//
-COMMIT;
-SET AUTOCOMMIT=0;
-CALL innodb_insert_proc(50000);
+CREATE TABLE t1(c1 INT, b VARCHAR(2400), index(b(100),c1))
+ENGINE=INNODB ROW_FORMAT=compressed ENCRYPTED=YES;
+BEGIN;
 COMMIT;
 # xtrabackup backup
 drop table t1;
@@ -20,6 +10,5 @@ drop table t1;
 # restart server
 select sum(c1) from t1;
 sum(c1)
-1249975000
+12497500
 DROP TABLE t1;
-drop procedure innodb_insert_proc;

mysql-test/suite/mariabackup/xb_compressed_encrypted.test

-#--source include/innodb_page_size_small.inc
+--source include/innodb_page_size_small.inc
 --source include/have_file_key_management.inc
 
-CREATE TABLE t1(c1 INT, b VARCHAR(2400), index(b(100),c1)) ENGINE=INNODB ROW_FORMAT=compressed ENCRYPTED=YES;
+CREATE TABLE t1(c1 INT, b VARCHAR(2400), index(b(100),c1))
+ENGINE=INNODB ROW_FORMAT=compressed ENCRYPTED=YES;
 
-DELIMITER //;
-CREATE PROCEDURE innodb_insert_proc (REPEAT_COUNT INT)
-BEGIN
-  DECLARE CURRENT_NUM INT;
-  SET CURRENT_NUM = 0;
-  WHILE CURRENT_NUM < REPEAT_COUNT DO
-    INSERT INTO t1 VALUES(CURRENT_NUM, concat(uuid(), CURRENT_NUM, repeat('ab', floor(rand()*100) ), uuid()));
-    SET CURRENT_NUM = CURRENT_NUM + 1;
-  END WHILE;
-END//
-DELIMITER ;//
+BEGIN;
+let $n= 5000;
+let $i= $n;
+let $u= `SELECT uuid()`;
+--disable_query_log
+while ($i) {
+  eval INSERT INTO t1
+  VALUES($n-$i, concat('$u', $n-$i, repeat('ab', floor(rand()*100)), '$u'));
+  dec $i;
+}
+--enable_query_log
 COMMIT;
 
-SET AUTOCOMMIT=0;
-CALL innodb_insert_proc(50000);
-COMMIT;
-
-
 echo # xtrabackup backup;
 --disable_result_log
 let $targetdir=$MYSQLTEST_VARDIR/tmp/backup;
@@ -32,5 +28,4 @@ exec $INNOBACKUPEX --apply-log $targetdir;
 --enable_result_log
 select sum(c1) from t1;
 DROP TABLE t1;
-drop procedure innodb_insert_proc;
 rmdir $targetdir;