[1LP][RFR] Fix setting logger level from config

[tpapaioa]

The loggers created via cfme.utils.log.setup_logger were hardcoded to have the INFO log level, ignoring any settings in conf/env.local.yaml. The associated file handlers do get created with the level from the yaml, but because the logger's level is fixed at INFO, no DEBUG logging is possible. This PR uses the yaml settings when creating the logger too, so that settings like the following in conf/env.local.yaml will log debug statements in cfme.log.

logging:
    level: DEBUG

[or]

logging:
    cfme:
        level: DEBUG