* Keystone was part of energy portion of highway bill * Legislating Keystone approval remains uphill climb * Fate of Keystone amendment to Senate bill unclear By Roberta Rampton WASHINGTON, Feb 16 (Reuters) - The U.S. House of Representatives passed an energy bill on Thursday that would wrest control of a permit for the controversial Keystone XL oil pipeline away from President Barack Obama, who has put the project on hold.