Ability to create role name aliases.

I wish there was a way to create role name aliases.

Currently if I decide on a role name once within my org it's very hard to ever change it later. This is visible in DC/OS where the role name slave_public was chosen at a time when Agents were still called Slaves. Without the ability to alias this role there's virtually zero chance of us ever updating that name to public_agent. I would imagine that other organisations run into similar issues once a role name is being used widely.