rebalanceTimer may be nil during initialization
rebalanceTimer may be nil during initialization

When first starting the server manager, it's possible that the rebalanceTimer in serverConfig will be nil, test accordingly.

leowmjw/consul,sequenceiq/consul,kingland/consul,tshak/consul,zeroae/consul,Thib17/consul,youhong316/consul,leowmjw/consul,andygoalkeeper/consul,tugbabodrumlu/consul,42wim/consul,i0rek/consul,youhong316/consul,scalp42/consul,sweeneyb/consul,hashicorp/consul,zeroae/consul,jovandeginste/consul,sweeneyb/consul,sweeneyb/consul,i0rek/consul,scalp42/consul,calgaryscientific/consul,sean-/consul,sunadm/consul,mckennajones/consul,rhyas/consul,42wim/consul,dankraw/consul,kingland/consul,pmalmgren/consul,lindenlab/consul,dankraw/consul,sweeneyb/consul,kylemcc/consul,leowmjw/consul,mckennajones/consul,sean-/consul,tugbabodrumlu/consul,samaitra/consul,42wim/consul,pmalmgren/consul,kaskavalci/consul,sean-/consul,vamage/consul,mshean/consul,kaskavalci/consul,dankraw/consul,kingland/consul,samaitra/consul,scalp42/consul,Thib17/consul,vamage/consul,calgaryscientific/consul,sean-/consul,i0rek/consul,andygoalkeeper/consul,sunadm/consul,jovandeginste/consul,pmalmgren/consul,i0rek/consul,kylemcc/consul,kaskavalci/consul,samaitra/consul,tshak/consul,Pivotal-Pierre-Delagrave/consul,sequenceiq/consul,samaitra/consul,calgaryscientific/consul,mckennajones/consul,calgaryscientific/consul,andygoalkeeper/consul,jovandeginste/consul,mckennajones/consul,Pivotal-Pierre-Delagrave/consul,sequenceiq/consul,kingland/consul,42wim/consul,Pivotal-Pierre-Delagrave/consul,tugbabodrumlu/consul,vamage/consul,sunadm/consul,calgaryscientific/consul,jovandeginste/consul,Pivotal-Pierre-Delagrave/consul,sunadm/consul,tshak/consul,scalp42/consul,kylemcc/consul,vamage/consul,Thib17/consul,mckennajones/consul,andygoalkeeper/consul,zeroae/consul,rhyas/consul,42wim/consul,hashicorp/consul,hashicorp/consul,sean-/consul,lindenlab/consul,pmalmgren/consul,kaskavalci/consul,youhong316/consul,kingland/consul,rhyas/consul,dankraw/consul,rhyas/consul,kylemcc/consul,sequenceiq/consul,tshak/consul,leowmjw/consul,mshean/consul,zeroae/consul,andygoalkeeper/consul,sequenceiq/consul,zeroae/consul,kaskavalci/consul,youhong316/consul,lindenlab/consul,sweeneyb/consul,samaitra/consul,lindenlab/consul,mshean/consul,lindenlab/consul,leowmjw/consul,rhyas/consul,vamage/consul,sunadm/consul,mshean/consul,youhong316/consul,tugbabodrumlu/consul,pmalmgren/consul,Pivotal-Pierre-Delagrave/consul,kylemcc/consul,mshean/consul,jovandeginste/consul,hashicorp/consul,tshak/consul,Thib17/consul,Thib17/consul,tugbabodrumlu/consul,dankraw/consul,scalp42/consul,i0rek/consul