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>

roles/kubernetes/node/templates/manifests/kube-proxy.manifest.j2

@@ -2,7 +2,7 @@ apiVersion: v1
 kind: Pod
 metadata:
   name: kube-proxy
-  namespace: kube-system
+  namespace: {{system_namespace}}
   labels:
     k8s-app: kube-proxy
 spec:
@@ -17,7 +17,7 @@ spec:
     - --v={{ kube_log_level }}
     - --master={{ kube_apiserver_endpoint }}
 {% if not is_kube_master %}
-    - --kubeconfig=/etc/kubernetes/node-kubeconfig.yaml
+    - --kubeconfig={{kube_config_dir}}/node-kubeconfig.yaml
 {% endif %}
     - --bind-address={{ ip | default(ansible_default_ipv4.address) }}
     - --cluster-cidr={{ kube_pods_subnet }}
@@ -31,10 +31,10 @@ spec:
     - mountPath: /etc/ssl/certs
       name: ssl-certs-host
       readOnly: true
-    - mountPath: /etc/kubernetes/node-kubeconfig.yaml
+    - mountPath: {{kube_config_dir}}/node-kubeconfig.yaml
       name: "kubeconfig"
       readOnly: true
-    - mountPath: /etc/kubernetes/ssl
+    - mountPath: {{kube_config_dir}}/ssl
       name: "etc-kube-ssl"
       readOnly: true
     - mountPath: /var/run/dbus
@@ -46,10 +46,10 @@ spec:
       path: /usr/share/ca-certificates
   - name: "kubeconfig"
     hostPath:
-      path: "/etc/kubernetes/node-kubeconfig.yaml"
+      path: "{{kube_config_dir}}/node-kubeconfig.yaml"
   - name: "etc-kube-ssl"
     hostPath:
-      path: "/etc/kubernetes/ssl"
+      path: "{{kube_config_dir}}/ssl"
   - name: "var-run-dbus"
     hostPath:
       path: "/var/run/dbus"