fix: Allow lower case log level
fix: Allow lower case log level

Add temporary fix to enable_deployer_networks.py to allow lower case
entries for log_level in the config.yml file.

Change-Id: I456ae1e8f1ade3bba01360966f81a3975f6342d1

open-power-ref-design-toolkit/cluster-genesis,open-power-ref-design-toolkit/cluster-genesis