ENH: Add sorted to sid list when truncating.
ENH: Add sorted to sid list when truncating.

For repeatable order of truncates between invocations.

Scapogo/zipline,quantopian/zipline,enigmampc/catalyst,bartosh/zipline,enigmampc/catalyst,humdings/zipline,humdings/zipline,quantopian/zipline,alphaBenj/zipline,florentchandelier/zipline,alphaBenj/zipline,florentchandelier/zipline,bartosh/zipline,Scapogo/zipline