Fix bug in connectivity_cluster_t.
Fix bug in connectivity_cluster_t.

If an error occurred at the wrong time, handle() would exit without removing the entry from routing_table. I fixed it and made it harder to make similar errors in the future by using a sentry object to remove the routing table entry instead of manually removing the entry at every exit point from the function.

bpradipt/rethinkdb,eliangidoni/rethinkdb,sontek/rethinkdb,mquandalle/rethinkdb,RubenKelevra/rethinkdb,sbusso/rethinkdb,victorbriz/rethinkdb,scripni/rethinkdb,bchavez/rethinkdb,alash3al/rethinkdb,yaolinz/rethinkdb,Qinusty/rethinkdb,rrampage/rethinkdb,losywee/rethinkdb,captainpete/rethinkdb,nviennot/rethinkdb,nviennot/rethinkdb,Qinusty/rethinkdb,elkingtonmcb/rethinkdb,yakovenkodenis/rethinkdb,KSanthanam/rethinkdb,yakovenkodenis/rethinkdb,urandu/rethinkdb,Qinusty/rethinkdb,greyhwndz/rethinkdb,ayumilong/rethinkdb,wkennington/rethinkdb,losywee/rethinkdb,mquandalle/rethinkdb,mquandalle/rethinkdb,robertjpayne/rethinkdb,losywee/rethinkdb,pap/rethinkdb,yaolinz/rethinkdb,ayumilong/rethinkdb,wojons/rethinkdb,jfriedly/rethinkdb,bchavez/rethinkdb,Wilbeibi/rethinkdb,wkennington/rethinkdb,JackieXie168/rethinkdb,mbroadst/rethinkdb,catroot/rethinkdb,JackieXie168/rethinkdb,4talesa/rethinkdb,sebadiaz/rethinkdb,Qinusty/rethinkdb,tempbottle/rethinkdb,marshall007/rethinkdb,lenstr/rethinkdb,alash3al/rethinkdb,sbusso/rethinkdb,Wilbeibi/rethinkdb,sbusso/rethinkdb,catroot/rethinkdb,sebadiaz/rethinkdb,wojons/rethinkdb,wojons/rethinkdb,scripni/rethinkdb,captainpete/rethinkdb,scripni/rethinkdb,rrampage/rethinkdb,marshall007/rethinkdb,gdi2290/rethinkdb,tempbottle/rethinkdb,AntouanK/rethinkdb,gavioto/rethinkdb,bchavez/rethinkdb,jesseditson/rethinkdb,wkennington/rethinkdb,spblightadv/rethinkdb,victorbriz/rethinkdb,dparnell/rethinkdb,losywee/rethinkdb,lenstr/rethinkdb,sebadiaz/rethinkdb,jesseditson/rethinkdb,JackieXie168/rethinkdb,gdi2290/rethinkdb,alash3al/rethinkdb,robertjpayne/rethinkdb,bpradipt/rethinkdb,greyhwndz/rethinkdb,ajose01/rethinkdb,RubenKelevra/rethinkdb,wujf/rethinkdb,gdi2290/rethinkdb,jmptrader/rethinkdb,greyhwndz/rethinkdb,niieani/rethinkdb,Wilbeibi/rethinkdb,matthaywardwebdesign/rethinkdb,yakovenkodenis/rethinkdb,eliangidoni/rethinkdb,nviennot/rethinkdb,Qinusty/rethinkdb,catroot/rethinkdb,AtnNn/rethinkdb,Qinusty/rethinkdb,eliangidoni/rethinkdb,wkennington/rethinkdb,grandquista/rethinkdb,elkingtonmcb/rethinkdb,niieani/rethinkdb,Wilbeibi/rethinkdb,eliangidoni/rethinkdb,captainpete/rethinkdb,rrampage/rethinkdb,elkingtonmcb/rethinkdb,KSanthanam/rethinkdb,ayumilong/rethinkdb,KSanthanam/rethinkdb,jesseditson/rethinkdb,yakovenkodenis/rethinkdb,victorbriz/rethinkdb,bchavez/rethinkdb,RubenKelevra/rethinkdb,marshall007/rethinkdb,ajose01/rethinkdb,alash3al/rethinkdb,Wilbeibi/rethinkdb,mcanthony/rethinkdb,yakovenkodenis/rethinkdb,lenstr/rethinkdb,greyhwndz/rethinkdb,sebadiaz/rethinkdb,spblightadv/rethinkdb,dparnell/rethinkdb,grandquista/rethinkdb,victorbriz/rethinkdb,nviennot/rethinkdb,bpradipt/rethinkdb,wkennington/rethinkdb,pap/rethinkdb,jmptrader/rethinkdb,lenstr/rethinkdb,gavioto/rethinkdb,lenstr/rethinkdb,marshall007/rethinkdb,dparnell/rethinkdb,JackieXie168/rethinkdb,bchavez/rethinkdb,bchavez/rethinkdb,elkingtonmcb/rethinkdb,niieani/rethinkdb,AtnNn/rethinkdb,dparnell/rethinkdb,spblightadv/rethinkdb,scripni/rethinkdb,eliangidoni/rethinkdb,niieani/rethinkdb,Qinusty/rethinkdb,RubenKelevra/rethinkdb,jmptrader/rethinkdb,ayumilong/rethinkdb,jmptrader/rethinkdb,AtnNn/rethinkdb,pap/rethinkdb,catroot/rethinkdb,urandu/rethinkdb,mbroadst/rethinkdb,JackieXie168/rethinkdb,KSanthanam/rethinkdb,losywee/rethinkdb,sbusso/rethinkdb,yaolinz/rethinkdb,rrampage/rethinkdb,KSanthanam/rethinkdb,4talesa/rethinkdb,pap/rethinkdb,ayumilong/rethinkdb,jesseditson/rethinkdb,jesseditson/rethinkdb,nviennot/rethinkdb,gdi2290/rethinkdb,spblightadv/rethinkdb,JackieXie168/rethinkdb,yakovenkodenis/rethinkdb,catroot/rethinkdb,alash3al/rethinkdb,captainpete/rethinkdb,yaolinz/rethinkdb,spblightadv/rethinkdb,bpradipt/rethinkdb,grandquista/rethinkdb,elkingtonmcb/rethinkdb,yakovenkodenis/rethinkdb,JackieXie168/rethinkdb,losywee/rethinkdb,sontek/rethinkdb,ajose01/rethinkdb,AntouanK/rethinkdb,sontek/rethinkdb,mbroadst/rethinkdb,sontek/rethinkdb,rrampage/rethinkdb,matthaywardwebdesign/rethinkdb,eliangidoni/rethinkdb,jmptrader/rethinkdb,niieani/rethinkdb,tempbottle/rethinkdb,dparnell/rethinkdb,robertjpayne/rethinkdb,gavioto/rethinkdb,mbroadst/rethinkdb,niieani/rethinkdb,spblightadv/rethinkdb,grandquista/rethinkdb,captainpete/rethinkdb,alash3al/rethinkdb,catroot/rethinkdb,lenstr/rethinkdb,jesseditson/rethinkdb,alash3al/rethinkdb,Wilbeibi/rethinkdb,jfriedly/rethinkdb,matthaywardwebdesign/rethinkdb,tempbottle/rethinkdb,captainpete/rethinkdb,urandu/rethinkdb,greyhwndz/rethinkdb,bchavez/rethinkdb,ayumilong/rethinkdb,ayumilong/rethinkdb,Qinusty/rethinkdb,sebadiaz/rethinkdb,wojons/rethinkdb,tempbottle/rethinkdb,RubenKelevra/rethinkdb,catroot/rethinkdb,mbroadst/rethinkdb,grandquista/rethinkdb,nviennot/rethinkdb,lenstr/rethinkdb,gavioto/rethinkdb,jesseditson/rethinkdb,mbroadst/rethinkdb,yaolinz/rethinkdb,wujf/rethinkdb,urandu/rethinkdb,wujf/rethinkdb,grandquista/rethinkdb,nviennot/rethinkdb,victorbriz/rethinkdb,gdi2290/rethinkdb,jfriedly/rethinkdb,yakovenkodenis/rethinkdb,wujf/rethinkdb,AtnNn/rethinkdb,grandquista/rethinkdb,elkingtonmcb/rethinkdb,wujf/rethinkdb,mcanthony/rethinkdb,pap/rethinkdb,captainpete/rethinkdb,grandquista/rethinkdb,4talesa/rethinkdb,sbusso/rethinkdb,gavioto/rethinkdb,wujf/rethinkdb,victorbriz/rethinkdb,wojons/rethinkdb,urandu/rethinkdb,marshall007/rethinkdb,ayumilong/rethinkdb,scripni/rethinkdb,greyhwndz/rethinkdb,RubenKelevra/rethinkdb,Qinusty/rethinkdb,wkennington/rethinkdb,AtnNn/rethinkdb,tempbottle/rethinkdb,lenstr/rethinkdb,robertjpayne/rethinkdb,sebadiaz/rethinkdb,wujf/rethinkdb,AntouanK/rethinkdb,captainpete/rethinkdb,robertjpayne/rethinkdb,AntouanK/rethinkdb,AntouanK/rethinkdb,gavioto/rethinkdb,sontek/rethinkdb,victorbriz/rethinkdb,AntouanK/rethinkdb,wkennington/rethinkdb,losywee/rethinkdb,matthaywardwebdesign/rethinkdb,wojons/rethinkdb,AntouanK/rethinkdb,greyhwndz/rethinkdb,wojons/rethinkdb,4talesa/rethinkdb,AtnNn/rethinkdb,gavioto/rethinkdb,gdi2290/rethinkdb,sbusso/rethinkdb,pap/rethinkdb,pap/rethinkdb,dparnell/rethinkdb,nviennot/rethinkdb,scripni/rethinkdb,matthaywardwebdesign/rethinkdb,RubenKelevra/rethinkdb,mbroadst/rethinkdb,urandu/rethinkdb,victorbriz/rethinkdb,Wilbeibi/rethinkdb,sontek/rethinkdb,greyhwndz/rethinkdb,4talesa/rethinkdb,tempbottle/rethinkdb,mquandalle/rethinkdb,marshall007/rethinkdb,mquandalle/rethinkdb,scripni/rethinkdb,KSanthanam/rethinkdb,4talesa/rethinkdb,rrampage/rethinkdb,gavioto/rethinkdb,ajose01/rethinkdb,spblightadv/rethinkdb,AtnNn/rethinkdb,elkingtonmcb/rethinkdb,jmptrader/rethinkdb,ajose01/rethinkdb,marshall007/rethinkdb,niieani/rethinkdb,matthaywardwebdesign/rethinkdb,JackieXie168/rethinkdb,sbusso/rethinkdb,jmptrader/rethinkdb,pap/rethinkdb,grandquista/rethinkdb,4talesa/rethinkdb,bpradipt/rethinkdb,mcanthony/rethinkdb,matthaywardwebdesign/rethinkdb,dparnell/rethinkdb,bpradipt/rethinkdb,bchavez/rethinkdb,bpradipt/rethinkdb,robertjpayne/rethinkdb,Wilbeibi/rethinkdb,sebadiaz/rethinkdb,mbroadst/rethinkdb,mcanthony/rethinkdb,AntouanK/rethinkdb,eliangidoni/rethinkdb,mcanthony/rethinkdb,mcanthony/rethinkdb,jfriedly/rethinkdb,eliangidoni/rethinkdb,alash3al/rethinkdb,tempbottle/rethinkdb,robertjpayne/rethinkdb,robertjpayne/rethinkdb,yaolinz/rethinkdb,jfriedly/rethinkdb,scripni/rethinkdb,rrampage/rethinkdb,wojons/rethinkdb,urandu/rethinkdb,mquandalle/rethinkdb,KSanthanam/rethinkdb,bpradipt/rethinkdb,urandu/rethinkdb,KSanthanam/rethinkdb,ajose01/rethinkdb,matthaywardwebdesign/rethinkdb,marshall007/rethinkdb,robertjpayne/rethinkdb,sontek/rethinkdb,sbusso/rethinkdb,dparnell/rethinkdb,jfriedly/rethinkdb,AtnNn/rethinkdb,mquandalle/rethinkdb,wkennington/rethinkdb,ajose01/rethinkdb,JackieXie168/rethinkdb,losywee/rethinkdb,elkingtonmcb/rethinkdb,jfriedly/rethinkdb,sontek/rethinkdb,bpradipt/rethinkdb,dparnell/rethinkdb,rrampage/rethinkdb,jfriedly/rethinkdb,catroot/rethinkdb,yaolinz/rethinkdb,niieani/rethinkdb,spblightadv/rethinkdb,4talesa/rethinkdb,mquandalle/rethinkdb,bchavez/rethinkdb,eliangidoni/rethinkdb,mbroadst/rethinkdb,mcanthony/rethinkdb,sebadiaz/rethinkdb,RubenKelevra/rethinkdb,ajose01/rethinkdb,mcanthony/rethinkdb,jmptrader/rethinkdb,gdi2290/rethinkdb,jesseditson/rethinkdb,yaolinz/rethinkdb