Description of problem:
Build_ami play is failing due to extra_vars openshift_release

Version-Release number of selected component (if applicable):
master branch

How reproducible:
Always

Steps to Reproduce:
1. rm -rf $HOME/ansible
2. ansible-playbook -i 3.10-hosts openshift-cluster/build_ami.yml -e @provisioning_vars.yml
3.

Actual results:
extra_vars / openshift_release commented out
TASK [openshift_repos : Enable RHEL repositories] **************************************************************************************************
task path: /home/ccallega/git/openshift-ansible/roles/openshift_repos/tasks/rhel_repos.yml:25
fatal: [ec2-18-205-28-146.compute-1.amazonaws.com]: FAILED! => {
    "msg": "The task includes an option with an undefined variable. The error was: 'openshift_version' is undefined\n\nThe error appears to have been in '/home/ccallega/git/openshift-ansible/roles/openshift_repos/tasks/rhel_repos.yml': line 25, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Enable RHEL repositories\n  ^ here\n"
}



extra_vars / openshift_release: v3.10 # per extra_vars example
TASK [openshift_sanitize_inventory : Abort when openshift_release is invalid] **********************************************************************
task path: /home/ccallega/git/openshift-ansible/roles/openshift_sanitize_inventory/tasks/main.yml:22
fatal: [ec2-18-205-28-146.compute-1.amazonaws.com]: FAILED! => {
    "changed": false,
    "msg": "openshift_release is \"v3.10\" which is not a valid version string.\nPlease set openshift_release to a version string and ensure that the value is quoted, ex: openshift_release=\"3.4\"."
}


extra_vars / openshift_release: 3.10
TASK [openshift_sanitize_inventory : Abort when openshift_release is invalid] **********************************************************************
task path: /home/ccallega/git/openshift-ansible/roles/openshift_sanitize_inventory/tasks/main.yml:22
fatal: [ec2-18-205-28-146.compute-1.amazonaws.com]: FAILED! => {
    "msg": "The conditional check 'not (openshift_release is match('^\\d+(\\.\\d+){1,3}$'))' failed. The error was: Unexpected templating type error occurred on ({% if not (openshift_release is match('^\\d+(\\.\\d+){1,3}$')) %} True {% else %} False {% endif %}): expected string or buffer\n\nThe error appears to have been in '/home/ccallega/git/openshift-ansible/roles/openshift_sanitize_inventory/tasks/main.yml': line 22, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Abort when openshift_release is invalid\n  ^ here\n"
} 


extra_vars / openshift_release: '3.10'
TASK [openshift_repos : Enable RHEL repositories] **************************************************************************************************
task path: /home/ccallega/git/openshift-ansible/roles/openshift_repos/tasks/rhel_repos.yml:25
fatal: [ec2-18-205-28-146.compute-1.amazonaws.com]: FAILED! => {
    "msg": "The task includes an option with an undefined variable. The error was: 'openshift_version' is undefined\n\nThe error appears to have been in '/home/ccallega/git/openshift-ansible/roles/openshift_repos/tasks/rhel_repos.yml': line 25, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Enable RHEL repositories\n  ^ here\n"
}


Expected results:
Play is expected to complete successfully


Additional info:


Description of problem:

Version-Release number of the following components:
rpm -q openshift-ansible
rpm -q ansible
ansible --version

How reproducible:

Steps to Reproduce:
1.
2.
3.

Actual results:
Please include the entire output from the last TASK line through the end of output if an error is generated

Expected results:

Additional info:
Please attach logs from ansible-playbook with the -vvv flag