move wiki page for SLA feature for storage I/O bandwidth

[Mei Liu]

Hi all,

I move the wiki from http://ovirt.org/SLA_for_storage_resource to 
http://www.ovirt.org/Features/Design/SLA_for_storage_io_bandwidth to 
confirm

http://www.ovirt.org/Feature_template

Sorry for the inconvenience.

Best regards,
Mei Liu(Rose)