Issue

OpenShift syncing groups with LDAP can find user groups but not their members when bind dn and passwords aren't specified.

With ldap_group_sync.yaml:

url: ldap://10.0.0.0:389 
insecure: true 
ca: my-ldap-ca-bundle.crt  
rfc2307:
...

The oadm groups sync got no users:

$ oadm groups sync --sync-config=ldap_group_sync.yaml
apiVersion: v1
items:
- apiVersion: v1
  kind: Group
  metadata:
    annotations:
      openshift.io/ldap.sync-time: 2016-08-02T17:26:08-0400
      openshift.io/ldap.uid: cn=admins,dc=example,dc=com
      openshift.io/ldap.url: localhost:389
    creationTimestamp: null
    labels:
      openshift.io/ldap.host: localhost
    name: admins
  users: null
kind: List
metadata: {}