redis_example.ini should have empty telemetry file fields

[the-other-james]

TelemetryDataFilePath and TelemetryFile are ignored when using a data source, and thus should be left blank.

Related #101

[the-other-james]

Taking a closer look... the meta file doesn't make sense to me either. Is the subscription info hard-coded?

[asgibson]

The meta file will contain this information, but the .ini for this has not been updated to be used as an effective example as of yet. Redis had been added for use by a project and their .ini made use of this. The parsing of the meta file is done in the __init__ function of any OnAirDataSource. Redis adapter's function, parse_meta_data_file, extracts subscription information from the meta file.

[asgibson]

Making these values blank doesn't change the behavior at all and would be more clear. However, it would be better to have these two keywords be required for parsers (data sources that use files) and not required for adapters (live data sources). Currently the keywords are required in either case, even though adapters ignore them.

[the-other-james]

I agree completely.