Add and remove influxdb relay to handle influxdb basic scalability

[gianarb]

When InfluxDB scales up to more than 1 we need to add https://github.com/influxdata/influxdb-relay on top of it. if it scales down to 1 we can remove it.

[fntlnz]

To achieve this we might want to consider using a StatefulSet instead of a deployment also.

[fntlnz]

Oh yea, we already have an issue for that https://github.com/gianarb/influxdb-operator/issues/24