TEST: Pass cls.env for test_handle_adjustment.
TEST: Pass cls.env for test_handle_adjustment.

Otherwise we inseret random assets into a new TradingEnvironment, which
is surprising in debugging.

ChinaQuants/zipline,wilsonkichoi/zipline,grundgruen/zipline,quantopian/zipline,florentchandelier/zipline,magne-max/zipline-ja,otmaneJai/Zipline,quantopian/zipline,umuzungu/zipline,dmitriz/zipline,nborggren/zipline,magne-max/zipline-ja,wilsonkichoi/zipline,bartosh/zipline,otmaneJai/Zipline,jimgoo/zipline-fork,nborggren/zipline,alphaBenj/zipline,umuzungu/zipline,enigmampc/catalyst,humdings/zipline,jimgoo/zipline-fork,dmitriz/zipline,grundgruen/zipline,alphaBenj/zipline,florentchandelier/zipline,Scapogo/zipline,humdings/zipline,Scapogo/zipline,bartosh/zipline,ChinaQuants/zipline,enigmampc/catalyst