(Real CEO Tamir Poleg/sourced) Re/Max Holdings Inc. is preparing for a major leadership shakeup as The Real Brokerage moves closer to completing its acquisition of the legacy franchisor, with CEO Erik Carlson set to step down and several other senior executives preparing to depart or take on new roles. Securityholders of both companies voted to approve Real’s proposed acquisition of Re/Max Holdings at special meetings held Friday, moving the t…