Jamaica Plain resident Devin Kreinbring doesn’t care if he wins the election for the 10th Suffolk District state rep seat this fall. As a candidate for the Workers Party, running for office, is more than just a state rep race. “What I do want, is to help to organize working people against injustice and this is valid terrain for that struggle,” writes Kreinbring on his campaign website. Kreinbring is a medical equipment repairman and feels…