Groups not interpreted from users.properties file
If a users.properties file contains something like the following then the roles are not parsed correctly. The g value comes back as a role rather than it being expanded to editor and writer.
g\:mygroup = group,editor,writer
Sorry, should have raised this on DDF. Raised now as 4519 on the GH Issues
This seems to be stemming from platform:security:stsropertyclaimshandler.
It might make more sense for it to use org.apache.karaf.jaas.modules.properties.PropertiesBackingEngine to read the user.properties file?