When converting 1.2.3 LB pools to 2.0 gateway groups, strip invalid characters from the group names and update any rules referencing the old name. Fixes #1515
Related issues
Bug #1515: Upgrading from 1.2.3, Load Balancer Pool to Gateway Group needs to strip invalid characters
When converting 1.2.3 LB pools to 2.0 gateway groups, strip invalid characters from the group names and update any rules referencing the old name. Fixes #1515