Major Description
We found that when a non-Ranger administrator is trying to remove a role that does not exist in Ranger, the error message returned from RangerBasePlugin#dropRole() at https://github.com/apache/ranger/blob/b8f76a8be532e3d41cca5acfb7cfbe6c35e469f1/agents-common/src/main/java/org/apache/ranger/plugin/service/RangerBasePlugin.java#L496-L506 would indicate that the name of the role does not exist, which reveals the non-existence of the role.