Description of problem:
currently the scaleup playbook will try to tag nodes as the user, currently logged in on the Master. If that is not an admin user, the playbook will fail.

Version-Release number of selected component (if applicable):
openshift-ansible-playbooks-3.0.47-6.git.0.7e39163.el7aos.noarch

How reproducible:
Always

Steps to Reproduce:
1. in a new environment, try to add a node using the scaleup playbook. Either prepare a new node or delete a existing one for testing purposes
2. create a new user without permissions (in my hase - with htpasswd)
 # htpasswd /etc/origin/openshift-htpasswd deleteme 
3. log in as that user into the console

# oc login
Authentication required for https://master.demo.lan:8443 (openshift)
Username: deleteme
Password: 
Login successful.

You don't have any projects. You can try to create a new project, by running

    $ oc new-project <projectname>

4. set up the hosts file with the new node as described in the solution and run the playbook:
 https://access.redhat.com/solutions/2150381

 # ansible-playbook /usr/share/ansible/openshift-ansible/playbooks/byo/openshift-cluster/scaleup.yml | tee ~/ansible_scale.log

Actual results:

 playbook fails at last step:

TASK: [openshift_manage_node | Wait for Node Registration] ******************** 
failed: [master.demo.lan] => (item=node3.demo.lan) => {"attempts": 20, "changed": false, "cmd": ["oc", "get", "node", "node3.demo.lan"], "delta": "0:00:00.113000", "end": "2016-04-14 18:18:33.774414", "failed": true, "item": "node3.demo.lan", "rc": 1, "start": "2016-04-14 18:18:33.661414", "stdout_lines": [], "warnings": []}
stderr: Error from server: User "deleteme" cannot get nodes at the cluster scope
msg: Task failed as maximum retries was encountered

FATAL: all hosts have already failed -- aborting


Expected results:

 Playbook tags the node successfully by using system:admin credentials

Additional info:
 As this is the very last step that fails, tagging the host(s) manually can help work around this. Alternatively - restore system:admin login on Master and re-run the playbook.