Bugfixes for Local Volume Provisioner

- Fixed an issue where storage class host directories were looped
through excessive target hosts
- Fixes examples in the LVP `README.md` to use nested dicts instead of a
list of dicts

roles/kubernetes-apps/external_provisioner/local_volume_provisioner/tasks/main.yml

@@ -10,7 +10,6 @@
   with_nested:
     - "{{ groups['k8s-cluster'] }}"
     - "{{ local_volume_provisioner_storage_classes.keys() }}"
-  failed_when: false
 
 - name: Local Volume Provisioner | Create addon dir
   file: