1. Proposed title of this feature request

OVN-kubernetes clusterwide loglevel adjustment rather than particular nodes via the env-overrides ConfigMap  

2. What is the nature and description of the request?

For purpose of cost cutting, and owing to the logs generated via the ovn-kubernetes resources, customers need to have a global setting to adjust the loglevel rather than hardcoded node names in the env-overrides configmap file

3. Why does the customer need this? (List the business requirements here)

Today, one can reduce the default loglevel for ovn-kubernetes via the configmap but it is hardcoded to take in the node names. While this is ok but for customers with dynamic clusters and autoscaling enabled, this becomes a hard task to manage the nodenames since the new nodes are constantly added and removed.

4. List any affected packages or components.

Currently hardcoded value:

 [+] https://github.com/openshift/cluster-network-operator/blob/master/bindata/network/ovn-kubernetes/common/008-script-lib.yaml#L23