Start server rebalance task after init'ing Serf
Start server rebalance task after init'ing Serf

Now that there is no longer an event loop driven directly by Serf, start the ServerManager task after Serf has been setup.  When testing and adjusting timers and timeouts to unreasonably low values, it's possible to tickle a race condition where Serf's NumNodes() would fail because Serf had not been initialized.

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