Enlarge resources and fix bugs

Created by: stoneshi-yunify

Signed-off-by: stoneshi-yunify stoneshi@yunify.com

commit summray:

• Change maxVolume to 9, as the system disk will be taken in count, ref: https://github.com/QingCloudAppcenter/QKE/issues/405
• Enlarge resources slightly. User reported some containers were OOM killed in a 30 nodes cluster.