Include /opt/bin in PATH for host deployed kubelet on CoreOS (#1591)

* Include /opt/bin in PATH for host deployed kubelet on CoreOS

* Removing conditional check for CoreOS

roles/kubernetes/node/templates/kubelet.j2

@@ -72,3 +72,5 @@ KUBELET_CLOUDPROVIDER="--cloud-provider={{ cloud_provider }}"
 {% else %}
 KUBELET_CLOUDPROVIDER=""
 {% endif %}
+
+PATH={{ bin_dir }}:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin