ServiceDispatchHandler: fix undefined exception in #removeServicePeer
ServiceDispatchHandler: fix undefined exception in #removeServicePeer

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