rpc: fix for 'no leader' in TLS tests
rpc: fix for 'no leader' in TLS tests

Ensure both servers know about each other before looking
for a leader.

tugbabodrumlu/consul,youhong316/consul,calgaryscientific/consul,hashicorp/consul,scalp42/consul,42wim/consul,youhong316/consul,calgaryscientific/consul,vamage/consul,zeroae/consul,hashicorp/consul,i0rek/consul,kingland/consul,youhong316/consul,zeroae/consul,tugbabodrumlu/consul,kingland/consul,vamage/consul,zeroae/consul,kingland/consul,scalp42/consul,scalp42/consul,youhong316/consul,hashicorp/consul,kingland/consul,42wim/consul,tugbabodrumlu/consul,zeroae/consul,vamage/consul,youhong316/consul,i0rek/consul,42wim/consul,calgaryscientific/consul,tugbabodrumlu/consul,scalp42/consul,i0rek/consul,tugbabodrumlu/consul,vamage/consul,vamage/consul,zeroae/consul,calgaryscientific/consul,hashicorp/consul,scalp42/consul,42wim/consul,i0rek/consul,calgaryscientific/consul,42wim/consul,i0rek/consul,kingland/consul