Use computed cost to end a Stochastic Load Balancer run

By simulating balancer runs on a set of cluster configurations and looking at the cost generated, looks like the balancer stays for a long time near the low cost "cluster" candidate. Please see the attached "SLB-Cost.pdf". This seems to be inline with limitation documented here. That means we have an opportunity to complete the balancer run if the cost is certain percentage of the initial cost which can result in much shorter run than the predefined default limit on the number of steps (1000000) and the run time of 30 secs. Would like to know the thoughts from others in the community. The changes should be pretty straightforward and will require adding a property to set the percentage.