Vagrant registration output needs to be filtered in case of blank password on Fedora 23

[pavanbhat21]

If by mistake user hits enter at the password prompt i.e blank pwd, the error msg needs to be filtered and handled well. Currently, we see the getpass.py script error on the screen.
See below:

[pavan@dhcp35-202 rhel-ose]$ vagrant up
Bringing machine 'default' up with 'libvirt' provider...
==> default: Starting domain.
==> default: Waiting for domain to get an IP address...
==> default: Waiting for SSH to become available...
==> default: Creating shared folders metadata...
==> default: Registering box with vagrant-registration...
default: Would you like to register the system now (default: yes)? [y|n]y
default: username: pbhat@redhat.com
default: password:
/usr/lib64/python2.7/getpass.py:83: GetPassWarning: Can not control echo on the terminal.
passwd = fallback_getpass(prompt, stream)
Warning: Password input may be echoed.
Password:
Invalid username or password. To create a login, please visit https://www.redhat.com/wapps/ugc/register.html
Registering to: subscription.rhn.redhat.com:443/subscription

[optak]

This is also relevant for windows 10, so probably not platform dependent:

    default: username: optak@redhat.com
    default: password: 
Error! Your console doesn't support hiding input. We'll ask for
input again below, but we WILL NOT be able to hide input. If this
is a problem for you, ctrl-C to exit and fix your stdin.
     default: password: 
/usr/lib64/python2.7/getpass.py:83: GetPassWarning: Can not control echo on the terminal.
  passwd = fallback_getpass(prompt, stream)
Warning: Password input may be echoed.
Password: 
Invalid username or password. To create a login, please visit https://www.redhat.com/wapps/ugc/register.html
Registering to: subscription.rhn.redhat.com:443/subscription