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/preinstall/tasks/0050-create_directories.yml

@@ -47,14 +47,12 @@
 
 - name: Create local volume provisioner directories
   file:
-    path: "{{ local_volume_provisioner_storage_classes[item.1].host_dir }}"
+    path: "{{ local_volume_provisioner_storage_classes[item].host_dir }}"
     state: directory
     owner: root
     group: root
     mode: 0700
-  with_nested:
-    - "{{ groups['k8s-cluster'] }}"
-    - "{{ local_volume_provisioner_storage_classes.keys() }}"
+  with_items: "{{ local_volume_provisioner_storage_classes.keys() }}"
   when:
     - inventory_hostname in groups['k8s-cluster']
     - local_volume_provisioner_enabled