The results of the by-elections to five assembly seats in Assam, held on Wednesday, will be a test for three political leaders active in the northeastern state. The Congress’ Gaurav Gogoi and Rakibul Hussain and Asom Gana Parishad’s Phani Bhushan Choudhury were not among the 34 candidates who fought in the polls but when the counting’s over on November 23, …