Fix 'ServersClientXML' object has no attribute 'delete_server_sync'

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Fix spacing

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Fix local variable 'server' referenced before assignment

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Fix type object 'ConsoleOutputTest' has no attribute '_interface'

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>