Trusted Clusters do not work with Authorized Keys Format

[russjones]

Problem

If you export Trusted Clusters with the new style format of host CA in known_hosts format and User CA authorized_keys format, both CAs are loaded into the backend correctly and visible from the Web UI, but you are not able to connect to a node within the Trusted Cluster. In the Web UI you will see:

access denied to root connecting to node-on-second-cluster                                                                                
disconnected  

Within the logs you will see:

level=debug msg="[SSH] conn(172.10.0.1:51294->172.10.1.2:3022, user=root) auth attempt with key [email protected] 13:ae:ed:de:5a:20:6a:7e:db:c0:db:61:74:de:c8:5c" file="srv/sshserver.go:556" func="srv.(*Server).keyAuth" 
level=debug msg="[SSH] successfully authenticated" file="srv/sshserver.go:596" fingerprint="[email protected] 13:ae:ed:de:5a:20:6a:7e:db:c0:db:61:74:de:c8:5c" func="srv.(*Server).keyAuth" local=172.10.1.2:3022 remote=172.10.0.1:51294 user=root 
level=debug msg="[HA SSH NODE] checkPermsissionToLogin(rjones, root)" file="srv/sshserver.go:404" func="srv.(*Server).checkPermissionToLogin" 
level=error msg="role root is not found" file="srv/sshserver.go:616" fingerprint="[email protected] 13:ae:ed:de:5a:20:6a:7e:db:c0:db:61:74:de:c8:5c" func="srv.(*Server).keyAuth" local=172.10.1.2:3022 remote=172.10.0.1:51294 user=root 

[pmoust]

Hit that as well - #919 should cover it, thanks