BSC-3210 - floodlight was writing a controller node into cassandra, this is...

BSC-3210 - floodlight was writing a controller node into cassandra, this is incorrect. So, if the properties file does not contain controller-id set, then floodlight will write localhost, which is causing a third controller node is cassandra. also there is no need for first boot and upgrade to write controller-id into properties files. so cleaning these up.