Remove rs namespace from Redis keys

Superfluous, since the whole db should be RS only

app/models/remote_storage_authorization.rb

@@ -29,7 +29,7 @@ class RemoteStorageAuthorization < ApplicationRecord
   end
 
   def delete_token_from_redis
-    key = "rs:authorizations:#{user.address}:#{token}"
+    key = "authorizations:#{user.cn}:#{token}"
     redis.srem? key, redis.smembers(key)
   end
 
@@ -44,7 +44,7 @@ class RemoteStorageAuthorization < ApplicationRecord
     end
 
     def store_token_in_redis
-      redis.sadd "rs:authorizations:#{user.address}:#{token}", permissions
+      redis.sadd "authorizations:#{user.cn}:#{token}", permissions
     end
 
     def schedule_token_expiry