golang client SSL config

ssl.go

	c, err := kafka.NewConsumer(&kafka.ConfigMap{
		"bootstrap.servers":               broker,
		"group.id":                        group,
		"go.events.channel.enable":        true,
		"go.application.rebalance.enable": true,
   		"security.protocol": 		"ssl",
    		"ssl.ca.location": 		"/path/to/ca-cert-file",
    		"ssl.certificate.location": 	"/path/to/client.pem",
    		"ssl.key.location": 		"/path/to/client.key",
    		//"ssl.key.password": 		"maybe_a_password_if_needed",
		"default.topic.config":            kafka.ConfigMap{"auto.offset.reset": "earliest"}})