servicerouter: remove callbacks when servicerouter terminates
servicerouter: remove callbacks when servicerouter terminates

matsluni/marathon,pgkelley4/marathon,Kosta-Github/marathon,janisz/marathon,Yhgenomics/marathon,Caerostris/marathon,vivekjuneja/marathon,sledigabel/marathon,janisz/marathon,natemurthy/marathon,guenter/marathon,gsantovena/marathon,mesosphere/marathon,yp-engineering/marathon,timcharper/marathon,guenter/marathon,lelezi/marathon,timcharper/marathon,ss75710541/marathon,gsantovena/marathon,titosand/marathon,pgkelley4/marathon,gsantovena/marathon,meln1k/marathon,ayouwei/marathon,lelezi/marathon,natemurthy/marathon,EasonYi/marathon,vivekjuneja/marathon,Caerostris/marathon,yp-engineering/marathon,EasonYi/marathon,matsluni/marathon,meln1k/marathon,Yhgenomics/marathon,cgvarela/marathon,guenter/marathon,meln1k/marathon,meln1k/marathon,ayouwei/marathon,gsantovena/marathon,timcharper/marathon,titosand/marathon,janisz/marathon,ss75710541/marathon,sledigabel/marathon,lelezi/marathon,okuryu/marathon,matsluni/marathon,guenter/marathon,hangyan/marathon,gsantovena/marathon,janisz/marathon,Caerostris/marathon,sledigabel/marathon,Caerostris/marathon,mesosphere/marathon,meln1k/marathon,Kosta-Github/marathon,ayouwei/marathon,Yhgenomics/marathon,natemurthy/marathon,vivekjuneja/marathon,guenter/marathon,mesosphere/marathon,mesosphere/marathon,janisz/marathon,EasonYi/marathon,cgvarela/marathon,ss75710541/marathon,cgvarela/marathon,Caerostris/marathon,hangyan/marathon,okuryu/marathon,hangyan/marathon,mesosphere/marathon,okuryu/marathon