Use key(and password-)less SSH authentication

testing/hosts/default/etc/ssh/sshd_config

@@ -0,0 +1,13 @@
+Port 22
+Protocol 2
+HostKey /etc/ssh/ssh_host_rsa_key
+HostKey /etc/ssh/ssh_host_dsa_key
+HostKey /etc/ssh/ssh_host_ecdsa_key
+UsePrivilegeSeparation no
+PermitRootLogin yes
+StrictModes no
+PubkeyAuthentication no
+PermitEmptyPasswords yes
+PrintMotd no
+PrintLastLog no
+UsePAM no