Redirect sys cmd 2>/dev/null in pt-kill tests to avoid false-positive errors.

t/pt-kill/execute_command.t

@@ -36,14 +36,14 @@ is(
    'No output without --print'
 );
 
-chomp($output = `cat $out`),
+chomp($output = `cat $out 2>/dev/null`),
 is(
    $output,
    'hello',
    '--execute-command'
 );
 
-diag(`rm $out`);
+diag(`rm $out 2>/dev/null`);
 
 SKIP: {
    skip 'Cannot connect to sandbox master', 2 unless $master_dbh;
@@ -59,7 +59,7 @@ SKIP: {
       '--print with --execute-command'
    );
 
-   chomp($output = `cat $out`);
+   chomp($output = `cat $out 2>/dev/null`);
    is(
       $output,
       'batty',
@@ -68,7 +68,7 @@ SKIP: {
 
    # Let our select sleep(2) go away before other tests are ran.
    sleep 1;
-   diag(`rm $out`);
+   diag(`rm $out 2>/dev/null`);
 
    # Don't make zombies (https://bugs.launchpad.net/percona-toolkit/+bug/919819)
    $master_dbh->do("USE pt_kill_zombie_test");

t/pt-kill/standard_options.t

@@ -54,20 +54,20 @@ SKIP: {
       'PID file removed'
    );
 
-   diag(`rm -rf /tmp/pt-kill.log`);
+   diag(`rm -rf /tmp/pt-kill.log 2>/dev/null`);
 }
 
 # #########################################################################
 # Issue 391: Add --pid option to all scripts
 # #########################################################################
-`touch /tmp/pt-script.pid`;
+diag(`touch /tmp/pt-script.pid`);
 $output = `$cmd --test-matching $trunk/t/lib/samples/pl/recset006.txt --match-state Locked  --print --pid /tmp/pt-script.pid 2>&1`;
 like(
    $output,
    qr{PID file /tmp/pt-script.pid already exists},
    'Dies if PID file already exists (--pid without --daemonize) (issue 391)'
 );
-`rm -rf /tmp/pt-script.pid`;
+diag(`rm -rf /tmp/pt-script.pid 2>/dev/null`);
 
 # #############################################################################
 # Done.