Revert "ignore stale qemu.pid files" and give isotovideo more time

to kill qemu - we'll see

Author: coolo

Diff for: lib/OpenQA/Worker/Engines/isotovideo.pm

@@ -40,9 +40,10 @@ sub set_engine_exec {
 sub _kill($) {
     my ($pid) = @_;
     my $n = kill(SIGTERM, $pid);
-    for (my $i = 0; $n && $i < 5; ++$i) {
-        sleep 1;
+    for (my $i = 0; $n && $i < 10; ++$i) {
+        sleep 3;
         $n = kill(SIGTERM, $pid);
+        warn "kill TERM resulted in $n";
     }
     if ($n) {
         warn "pid $pid didn't die, sending KILL";

Diff for: lib/OpenQA/Worker/Pool.pm

@@ -43,6 +43,10 @@ sub lockit(){
 
 sub clean_pool(){
     return if $nocleanup;
+    if (-e "$pooldir/qemu.pid") {
+        print "QEMU should be dead - WASUP?\n";
+        exit(1);
+    }
     for my $file (<$pooldir/*>) {
         if (-d $file) {
             remove_tree($file);