balloon_hotplug.cfg:change hotplug/unplug repeat time to 100

change balloon hotplug/unplug repeat time from 5 to 100
Signed-off-by: NLi Jin <lijin@redhat.com>

qemu/tests/cfg/balloon_hotplug.cfg

@@ -3,7 +3,7 @@
     type = balloon_hotplug
     monitor_type = qmp
     monitors = qmp1
-    balloon_repeats = 5
+    balloon_repeats = 100
     virtio_balloon_pause = 10.0
     free_mem_cmd = cat /proc/meminfo |grep MemFree
     Linux: