Add cache refresh when leader not found
Add cache refresh when leader not found

Needs tests.

bridgewell/kafka-net,nightkid1027/kafka-net,PKRoma/kafka-net,geffzhang/kafka-net,BDeus/KafkaNetClient,aNutForAJarOfTuna/kafka-net,EranOfer/KafkaNetClient,gigya/KafkaNetClient,Jroland/kafka-net,martijnhoekstra/kafka-net,CenturyLinkCloud/kafka-net