Description of problem:

When trying to configure an ldap provider with the insecure parameter set, we endup with a master-config that causes failure with master to start. 


Version-Release number of the following components:
# rpm -q openshift-ansible
openshift-ansible-3.10.47-1.git.0.95bc2d2.el7_5.noarch
# rpm -q ansible
ansible-2.4.6.0-1.el7ae.noarch
# ansible --version
ansible 2.4.6.0
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /bin/ansible
  python version = 2.7.5 (default, Feb 20 2018, 09:19:12) [GCC 4.8.5 20150623 (Red Hat 4.8.5-28)]


How reproducible:
100%

Steps to Reproduce:
1. Install 3.10 with the following identity providers

openshift_master_identity_providers=[{'name': 'my_ldap_provider', 'challenge': 'true', 'login': 'true', 'kind': 'LDAPPasswordIdentityProvider', 'attributes': {'id': ['dn'], 'email': ['mail'], 'name': ['cn'], 'preferredUsername': ['uid']}, 'bindDN': '', 'bindPassword': '', 'insecure': 'true', 'url': 'ldap://ldap.example.com:389/ou=users,dc=example,dc=com?uid'}]


Actual results:
Master Fails with error: 

Invalid MasterConfig /etc/origin/master/master-config.yaml
oauthConfig.identityProvider[0].provider.ca: Invalid value: "/etc/origin/master/my_ldap_provider_ldap_ca.crt": Cannot specify a ca with insecure=true

Expected results:
Ca to not get set for identity providers in master-config.yaml


Additional info:
Upstream 3.11 fix:
https://github.com/openshift/openshift-ansible/pull/9889


Back Port to 3.10 needed