Adds some supplemental tests for RPC "no leader" retries.
Adds some supplemental tests for RPC "no leader" retries.

This adds some extra tests for #2175.

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