Enable scheduling of critical pods and network plugins on master

Added toleration to DNS, netchecker, fluentd, canal, and
calico policy.

Also small fixes to make yamllint pass.

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

@@ -18,6 +18,9 @@ spec:
         k8s-app: canal-node
     spec:
       hostNetwork: true
+      tolerations:
+        - effect: NoSchedule
+          operator: Exists
       volumes:
         # Used by calico/node.
         - name: lib-modules

roles/network_plugin/flannel/templates/flannel-pod.yml

@@ -8,6 +8,9 @@ metadata:
     app: "flannel"
     version: "v0.1"
 spec:
+  tolerations:
+    - effect: NoSchedule
+      operator: Exists
   volumes:
     - name: "subnetenv"
       hostPath:

roles/network_plugin/weave/templates/weave-net.yml.j2

@@ -153,4 +153,4 @@ items:
                 path: /var/lib/dbus
             - name: lib-modules
               hostPath:
-                path: /lib/modules
+                path: /lib/modules