pipeline logging configuration needed

[echeipesh]

When running Raster Vision pipelines the python logging is configured only for the Raster Vision module. This is particularly a problem for Raster Vision pipelines that run on AWS batch where the lack of configuration effectively suppresses all log output from pipeline stages.

Since at this point Raster Vision owns the execution of the pipeline, its both the entry point and the source of the command that is running on as AWS Batch job, it should provide a way to configure logging.

Two additional options would be helpful:

--global-log-level that invokes logging.basicConfig as part of reading RVConfig

--logging-config that reads/copies logging.conf file and invokes logging.config.fileConfig as part of reading RVConfig

The second option would be useful for debugging troublesome jobs when you'd want to turn the log chattiness deferentially for a particular module.