wspr/nacl: Fixes to get nacl working with wspr with new tests

Change-Id: I3fffe4bd670e3b7607434fdef0f13db7a0ab4664
diff --git a/services/wsprd/app/app.go b/services/wsprd/app/app.go
index 47ea6a5..c1e404a 100644
--- a/services/wsprd/app/app.go
+++ b/services/wsprd/app/app.go
@@ -282,6 +282,8 @@
 	for _, server := range c.servers {
 		server.Stop()
 	}
+
+	c.RT().Cleanup()
 }
 
 func (c *Controller) setup() {