John M. Collins, 66, of Groveland, died Monday, March 4. Born in Haverhill. Collins was a graduate of the former Haverhill Trade School, class of 1971. Calling hours are Friday, March 8 from 4-7 p.m. at the H.L. Farmer and Sons Funeral Home, 106 Summer St., Haverhill. Funeral service is Saturday, Ma