More test case fixes.

mysql-test/suite/innodb/r/innodb-alter-discard.result

+call mtr.add_suppression("InnoDB: Cannot open datafile for read-only: .*");
 SET GLOBAL innodb_file_per_table=1;
 CREATE TABLE t(a INT)ENGINE=InnoDB;
 call mtr.add_suppression("InnoDB: Operating system error number .* in a file operation.");

mysql-test/suite/innodb/t/innodb-alter-discard.test

@@ -3,6 +3,8 @@
 --source include/not_embedded.inc
 --source include/have_innodb.inc
 
+call mtr.add_suppression("InnoDB: Cannot open datafile for read-only: .*");
+
 let $MYSQLD_DATADIR=`select @@datadir`;
 SET GLOBAL innodb_file_per_table=1;
 CREATE TABLE t(a INT)ENGINE=InnoDB;

mysql-test/suite/innodb/t/innodb_simulate_comp_failures_small.test

+--source include/have_debug.inc
+--source include/not_valgrind.inc
+
 --let $num_inserts = 1000
 --let $num_ops = 30
 --source suite/innodb/include/innodb_simulate_comp_failures.inc