Hollis-Brookline high school has hired former Westford Academy coach Patrick Gendron as the school’s new head football coach.  Gendron was the most recently an assistant at North Middlesex High School for the past three seasons and was the head coach at Westford Academy from 2017 to 2021.  Gendron is replacing Milt Robinson who served as the interim head coach last season. The Cavaliers went 0-9 after a tumultuous off-season in……