Rudder

If I use sshKeyManagement, I canno't set several keys per user, and flush all others
If I set key1 for user root, with tag tag1, key2 for user root, and tag tag2, and key3 for user root, tag3, I can't enforce these 3 keys for root:

1. if i set flush for each, this is always repaired, and I get only one key at the end
2. if i set flush for only one, it is still always repaired, and I can have either one or two keys

We should group keys (and flush), per users