Fixing lib/Rally to update the methods in Workload base
Fixing lib/Rally to update the methods in Workload base

The functionality seemed broken due to a later commit that removed the methods
that update WorkloadBase

Change-Id: I1aa82c7c3fa698e42253139b82b8504991cd0dff

jtaleric/browbeat,jkilpatr/browbeat,jkilpatr/browbeat,jtaleric/browbeat