Bengaluru: Signalling his retirement from electoral politics, former Chief Minister and senior BJP leader B.S. Yediyurappa (BSY) on Friday propped up his second son and State BJP Vice-President B.Y. Vijayendra as his successor in Shikaripura Assembly segment of Shivamogga district for next year’s Assembly polls. BSY, a four-time Chief Minister, was elected from Shikaripura for…