Description of problem:

Logging deployment fails due to extra ')' in openshift_logging_master_public_url

Version-Release number of the following components:
openshift-ansible-3.10.0-0.28.0-2-g826bcf297

How reproducible:
100%

Steps to Reproduce:
1. Try to install logging stack

Actual results:
fatal: [master-0.scale-ci.example.com]: FAILED! => {"changed": false, "msg": "AnsibleError: {{ openshift_logging_master_public_url }}: {{ 'https://' + openshift_master_cluster_public_hostname
 | default(openshift.common.public_hostname) + ':' ~ openshift_master_api_port) }}: template error while templating string: unexpected ')'. String: {{ 'https://' + openshift_master_cluster_public_hostname | default(openshift.common.public_hostname) + ':' ~ openshift_master_api_port) }}"}

Expected results:
Successful logging stack install