EC2 api DescribeReservedInstances call does not support 2011-11-01 API version offeringType parameter

[gtalton]

Amazon has started offering 3 tiers to their Reserved Instance purchases and the ability to query them is outlined in the API

There is a new parameter that I need to use to get information on light and heavy use reserved instances .. this uses the new offeringType parameter that can be a string where valid values are: Heavy Utilization | Medium Utilization | Light Utilization.