Merge pull request #1224 from VincentS/var_fix

Fix undefined variables for etcd deployment

inventory/group_vars/all.yml

+# Valid bootstrap options (required): ubuntu, coreos, centos, none
+bootstrap_os: none
+
+#Directory where etcd data stored
+etcd_data_dir: /var/lib/etcd
+
+# Directory where the binaries will be installed
+bin_dir: /usr/local/bin
+
 ## The access_ip variable is used to define how other nodes should access
 ## the node.  This is used in flannel to allow other flannel nodes to see
 ## this node for example.  The access_ip is really useful AWS and Google

inventory/group_vars/k8s-cluster.yml

-# Valid bootstrap options (required): ubuntu, coreos, centos, none
-bootstrap_os: none
-
-#Directory where etcd data stored
-etcd_data_dir: /var/lib/etcd
-
-# Directory where the binaries will be installed
-bin_dir: /usr/local/bin
-
 # Kubernetes configuration dirs and system namespace.
 # Those are where all the additional config stuff goes
 # the kubernetes normally puts in /srv/kubernets.