Merge pull request #1279 from Xiangmin/block_resize_bugfix

block_resize.cfg: RHEL5 need reboot step in block_resize case

qemu/tests/cfg/block_resize.cfg

 - block_resize:
     # As XP and 2003 guest disk manager not support disk shrink. So don't test them for this feature
     no WinXP Win2003
+    no RHEL.4
     only qcow2 raw
     type = block_resize
     images += " stg"
@@ -48,3 +49,5 @@
         disk_change_ratio = 1.5
     raw:
         disk_change_ratio = 1.5 0.5
+    RHEL.5:
+        need_reboot = yes