Address standalone kubelet config case

Also place in global vars and do not repeat the kube_*_config_dir
and kube_namespace vars for better code maintainability and UX.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

contrib/network-storage/glusterfs/roles/kubernetes-pv/ansible/tasks/main.yaml

@@ -1,6 +1,6 @@
 ---
 - name: Kubernetes Apps | Lay Down k8s GlusterFS Endpoint and PV
-  template: src={{item.file}} dest=/etc/kubernetes/{{item.dest}}
+  template: src={{item.file}} dest={{kube_config_dir}}/{{item.dest}}
   with_items:
           - { file: glusterfs-kubernetes-endpoint.json.j2, type: ep, dest: glusterfs-kubernetes-endpoint.json}
           - { file: glusterfs-kubernetes-pv.yml.j2, type: pv, dest: glusterfs-kubernetes-pv.yml}
@@ -13,7 +13,7 @@
     namespace: default
     kubectl: "{{bin_dir}}/kubectl"
     resource: "{{item.item.type}}"
-    filename: "/etc/kubernetes/{{item.item.dest}}"
+    filename: "{{kube_config_dir}}/{{item.item.dest}}"
     state: "{{item.changed | ternary('latest','present') }}"
   with_items: "{{ gluster_pv.results }}"
   when: inventory_hostname == groups['kube-master'][0] and groups['gfs-cluster'] is defined