Adding yamllinter to ci steps (#1556)

* Adding yaml linter to ci check

* Minor linting fixes from yamllint

* Changing CI to install python pkgs from requirements.txt

- adding in a secondary requirements.txt for tests
- moving yamllint to tests requirements

roles/kubernetes/node/defaults/main.yml

@@ -1,3 +1,4 @@
+---
 # Valid options: docker (default), rkt, or host
 kubelet_deployment_type: host
 
@@ -49,7 +50,7 @@ kube_apiserver_node_port_range: "30000-32767"
 
 kubelet_load_modules: false
 
-##Support custom flags to be passed to kubelet
+## Support custom flags to be passed to kubelet
 kubelet_custom_flags: []
 
 # This setting is used for rkt based kubelet for deploying hyperkube

roles/kubernetes/node/tasks/install.yml

@@ -21,4 +21,3 @@
     dest: "/etc/systemd/system/kubelet.service"
     backup: "yes"
   notify: restart kubelet
-

roles/kubernetes/node/tasks/install_rkt.yml

@@ -20,8 +20,8 @@
     path: /var/lib/kubelet
 
 - name: Create kubelet service systemd directory
-  file: 
-    path: /etc/systemd/system/kubelet.service.d 
+  file:
+    path: /etc/systemd/system/kubelet.service.d
     state: directory
 
 - name: Write kubelet proxy drop-in
@@ -30,4 +30,3 @@
     dest: /etc/systemd/system/kubelet.service.d/http-proxy.conf
   when: http_proxy is defined or https_proxy is defined or no_proxy is defined
   notify: restart kubelet
-