test: run eunit with a node name

Makefile

@@ -75,7 +75,7 @@ mix-deps-get: $(ELIXIR_COMMON_DEPS)
 
 .PHONY: eunit
 eunit: $(REBAR) merge-config
-	@ENABLE_COVER_COMPILE=1 $(REBAR) eunit -v -c --cover_export_name $(CT_COVER_EXPORT_PREFIX)-eunit
+	@ENABLE_COVER_COMPILE=1 $(REBAR) eunit  --name eunit@127.0.0.1 -v -c --cover_export_name $(CT_COVER_EXPORT_PREFIX)-eunit
 
 .PHONY: proper
 proper: $(REBAR)