Description of problem:
1. 'rhui haproxy reinstall' says there is no registered isntances with the given hostname, but there is one
2. if to feed 'rhui haproxy reinstall' with cds hostname it will be reinstalled

Version-Release number of selected component (if applicable):
iso 20161220

How reproducible:
always

Steps to Reproduce:
1. rhui haproxy list to insure there is one
2. rhui haproxy reinstall hostname
3. msg: There are no registered instances with that hostname.


Actual results:
>> [root@rhua ~]# rhui haproxy list

-= RHUI HAProxy Load-balancers =-

  Hostname:             hap01.example.com
  SSH Username:         ec2-user
  SSH Private Key:      /root/.ssh/id_rsa_rhua


------------------------------------------------------------------------------
>> [root@rhua ~]# rhui haproxy reinstall hap01.example.com --help
usage: rhui haproxy reinstall [-h] hostname

positional arguments:
  hostname    The hostname of the instance to reinstall on; this instance must
              be registered already.

optional arguments:
  -h, --help  show this help message and exit

>>[root@rhua ~]# rhui haproxy reinstall hap01.example.com
There are no registered instances with that hostname.

>> rhui haproxy reinstall cds01.example.com

Checking that the RHUA services are reachable from the instance...
[ec2-user.com] sudo: yum install -d 0 -e 0 -y nc
[ec2-user.com] sudo: nc rhua.example.com 8140 < /dev/null
Done.


Installing Puppet on the HAProxy Load-balancer...
[ec2-user.com] sudo: yum install -y puppet
[ec2-user.com] sudo: puppet config set server rhua.example.com
Done.
[ec2-user.com] sudo: mkdir -p /etc/facter/facts.d
[ec2-user.com] put: /etc/puppet/rhui-secrets/rhui-custom-facts.json -> /etc/facter/facts.d/rhui-custom-facts.json

Setting up certificates...
[ec2-user.com] run: echo $HOME
[ec2-user.com] sudo: puppet config print certname
[ec2-user.com] sudo: rm -rf /var/lib/puppet/ssl
[ec2-user.com] sudo: mkdir -p /var/lib/puppet/ssl/{certs,private_keys}
[localhost] local: puppet cert clean cds01.example.com
[ec2-user.com] put: /var/lib/puppet/ssl/certs/ca.pem -> /home/ec2-user/ca.pem
[ec2-user.com] sudo: mv /home/ec2-user/ca.pem /var/lib/puppet/ssl/certs/ca.pem
[ec2-user.com] sudo: puppet agent --onetime --detailed-exitcodes --no-daemonize --no-usecacheonfailure
[ec2-user.com] run: echo $HOME
[ec2-user.com] sudo: cp -r /var/lib/puppet/ssl/certificate_requests/cds01.example.com.pem /home/ec2-user/cds01.example.com.pem
[ec2-user.com] sudo: chown -R $USER /home/ec2-user/cds01.example.com.pem
[ec2-user.com] download: /var/lib/puppet/ssl/ca/requests/cds01.example.com.pem <- /home/ec2-user/cds01.example.com.pem

Warning: Local file /var/lib/puppet/ssl/ca/requests/cds01.example.com.pem already exists and is being overwritten.

[ec2-user.com] sudo: rm -rf /home/ec2-user/cds01.example.com.pem
[localhost] local: puppet cert sign cds01.example.com
Done.

Installing and configuring the HAProxy Load-balancer...
[ec2-user.com] sudo: puppet agent --onetime --detailed-exitcodes --no-daemonize --no-usecacheonfailure
Done.

Ensuring that Apache and Crane are available...
[localhost] local: yum install -y nc
[localhost] local: nc cds01.example.com 443 < /dev/null
[localhost] local: nc cds01.example.com 5000 < /dev/null
Done.