PROVIDENCE — Highly controversial legislation to lock in the terms of expired teacher and municipal employee contracts is headed to final votes in the House and Senate on Thursday after a series of next-to-last votes that again put the "yes'' vote of Senator — and teachers' union VP — Valarie Lawson in the spotlight.Lawson, a Democrat, is a $78,710-a-year East Providence High School teacher, but it is her other role — as a $29,000 a year paid vice [...]