Heketi route not configured correctly after installing CNS using ansible

Issue

• When attempting to install CNS using the Advanced Installation instructions, the Ansible playbook crashes every single time with the following error:"TASK [openshift_storage_glusterfs : Determine StorageClass heketi URL]

 FAILED! => {"failed": true, "msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'spec'\n\nThe error appears to have been in '/opt/git/openshift-3.6-setup/openshift-ansible/roles/openshift_storage_glusterfs/tasks/glusterfs_common.yml': line 238, 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: Determine StorageClass heketi URL\n ^ here\n\nexception type: <class 'ansible.errors.AnsibleUndefinedVariable'>\nexception: 'dict object' has no attribute 'spec'"}"Debugging quickly leads us to the problem: the previous task (openshift_storage_glusterfs : Get heketi route) attempts to get the Heketi route by the name "heketi-{{ glusterfs_name }}". But when listing the routes that exist in the project that Gluster is installed in, no route exists with that name.