Add ConfigMap for basic configuration options

Container settings moved from deamonset yaml to a separate
configmap.

roles/network_plugin/canal/templates/canal-config.yml.j2

@@ -0,0 +1,22 @@
+# This ConfigMap can be used to configure a self-hosted Canal installation.
+# See `canal.yaml` for an example of a Canal deployment which uses
+# the config in this ConfigMap.
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: canal-config
+data:
+  # Configure this with the location of your etcd cluster.
+  etcd_endpoints: "{{ etcd_access_endpoint }}"
+
+  # The interface used by canal for host <-> host communication.
+  # If left blank, then the interface is chosing using the node's
+  # default route.
+  flanneld_iface: "{{ canal_iface }}"
+
+  # Whether or not to masquerade traffic to destinations not within
+  # the pod network.
+  masquerade: "{{ canal_masquerade }}"
+
+  # Cluster name for Flannel etcd path
+  cluster_name: "{{ cluster_name }}"