as/thrift: add bossMode for handler
as/thrift: add bossMode for handler

RyanTech/tchannel,savaki/tchannel,benfleis/tchannel,Zirpon/tchannel,hustxiaoc/tchannel,Zirpon/tchannel,i/tchannel,vanloswang/tchannel,chenwenbin928/tchannel,sasa233/tchannel,hustxiaoc/tchannel,benfleis/tchannel,RyanTech/tchannel,sasa233/tchannel,bunnyblue/tchannel,vanloswang/tchannel,bunnyblue/tchannel,benfleis/tchannel,sasa233/tchannel,chenwenbin928/tchannel,i/tchannel,vanloswang/tchannel,hustxiaoc/tchannel,savaki/tchannel,chenwenbin928/tchannel,i/tchannel,RyanTech/tchannel,bunnyblue/tchannel,Zirpon/tchannel,savaki/tchannel