Merge pull request #111 from Smana/flannel_pods_subnet

use 'kube_pods_subnet' var for flannel conf

k8s-postgres @ a03a14c4

-Subproject commit 0f9cda318283ba67b73ba57e794347cbffb2a169
+Subproject commit a03a14c46f19732fa7a3ee37a37d9f0375a6e2d2

roles/network_plugin/templates/flannel/network.json

-{ "Network": "{{ kube_service_addresses }}", "SubnetLen": {{ kube_network_node_prefix }}, "Backend": { "Type": "vxlan" } }
+{ "Network": "{{ kube_pods_subnet }}", "SubnetLen": {{ kube_network_node_prefix }}, "Backend": { "Type": "vxlan" } }