Loop in cpu_cost model::GetEquivClassToEquivClassesArcs need to simplified , make method and return true or false and use it in for loop condition

[Suresh-Babu-K]

Loop in cpu_cost model::GetEquivClassToEquivClassesArcs need to simplified , make method and return true or false and use it in for loop conditional check and increment.
for (cur_resource = task_resource_request;
cur_resource.cpu_cores_ < available_resources.cpu_cores_ &&
cur_resource.ram_cap_ < available_resources.ram_cap_ &&
cur_resource.ephemeral_storage_ < available_resources.ephemeral_storage_ &&
index < ecs_for_machine->size() && task_count < rd.max_pods();
cur_resource.cpu_cores_ += task_resource_request->cpu_cores_,
cur_resource.ram_cap_ += task_resource_request->ram_cap_,
cur_resource.ephemeral_storage_ += task_resource_request->ephemeral_storage_,
index++, task_count++) {
cout<<"** pushing at index"<<index<<endl;
pref_ecs->push_back(ec_machines.second[index]);
}