SSH does not prompt for username/password

Some devices, like Cisco WLC do not authenticate using SSH (ssh is
noauth) and actually prompt for auth via shell.
CiscoSMB is not one of those kits.

We probably should do sepearate bug for the error messages this caused.

```
        begin
          @username ? shell_login : expect(@node.prompt)
        rescue Timeout::Error
          raise PromptUndetect, [ @output, 'not matching configured prompt', @node.prompt ].join(' ')
        end
```

Here Timeout:Error is not raised by ```expect(@node-prompt)``` it is raised by
```shell-login```, which is triggered due to @username prompt set.

Potential fixes

 1. change the error to more generic one, covering both cases
 2. add rescue in 'def shell_login' for Timeout::Error and report it there

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/oxidized/model/ciscosmb.rb b/lib/oxidized/model/ciscosmb.rb
index 47e8391..3ef9a85 100644
--- a/lib/oxidized/model/ciscosmb.rb
+++ b/lib/oxidized/model/ciscosmb.rb
@@ -33,9 +33,12 @@ class CiscoSMB < Oxidized::Model
     cfg
   end
 
-  cfg :telnet, :ssh do
+  cfg :telnet do
     username /^User Name:/
     password /^\r?Password:$/
+  end
+
+  cfg :telnet, :ssh do
     post_login 'terminal datadump' # Disable pager
     post_login 'terminal width 0'
     pre_logout 'exit'