Description of problem:

When installer configures proxy on docker-registry, Kubernetes ClusterIP is missing in the NO_PROXY. The docker-registry failed to talk to Kubernetes because of this configuration.

Version-Release number of the following components:

$ rpm -q openshift-ansible
openshift-ansible-3.7.14-1.git.0.4b35b2d.el7.noarch
$ rpm -q ansible
ansible-2.4.1.0-1.el7.noarch
$ ansible --version
ansible 2.4.1.0
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/home/nekop/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.5 (default, May  3 2017, 07:55:04) [GCC 4.8.5 20150623 (Red Hat 4.8.5-14)]

How reproducible:

Always in proxy env

Steps to Reproduce:
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Actual results:

docker-registry NO_PROXY doesn't have Kubernetes ClusterIP. Docker login fails because the registry cannot talk to the master for auth.

Expected results:

Docker login succeeds, docker-registry NO_PROXY has Kubernetes ClusterIP.

Additional info: