Add label sync cron job and add back label which has external depende…

…ncy (#104)

* add kubeflow_label.yml for label sycn across repos in kubeflow, along with helper script to generate it.

* reformat process_label.py to fix pylint check

* handle code review feedback & change code to python3

* cron job config for label sync, along with adding 'do-not-merge' back

* handle review feedback

label_sync/cluster/label_sync_job.yaml

@@ -0,0 +1,38 @@
+apiVersion: batch/v1beta1
+kind: CronJob
+metadata:
+  name: label-sync-fix
+spec:
+  schedule: "17 23 * * *"    # Every day 23:17 / 11:17PM
+  concurrencyPolicy: Forbid
+  jobTemplate:
+    metadata:
+      labels:
+        app: label-sync
+    spec:
+      template:
+        spec:
+          containers:
+            - name: label-sync
+              image: gcr.io/k8s-testimages/label_sync:v20180227-377685119
+              args:
+              - --config=/etc/config/kubeflow_label.yml
+              - --confirm=true
+              - --orgs=kubeflow
+              - --token=/etc/github/bot-token
+              - --skip=kubeflow/kubeflow,kubeflow/tf-operator,kubeflow/testing,kubeflow/example-seldon,kubeflow/experimental-kvc
+              volumeMounts:
+              - name: oauth
+                mountPath: /etc/github
+                readOnly: true
+              - name: config
+                mountPath: /etc/config
+                readOnly: true
+          restartPolicy: Never
+          volumes:
+          - name: oauth
+            secret:
+              secretName: bot-token-github
+          - name: config
+            configMap:
+              name: label-config-v2

label_sync/kubeflow_label.yml

@@ -22,6 +22,8 @@ labels:
   name: area/logging
 - color: d2b48c
   name: area/operator
+- color: d2b48c
+  name: area/usage
 - color: ecfc15
   name: community/discussion
 - color: ecfc15
@@ -93,19 +95,24 @@ labels:
 - color: 00daff
   name: starter
 - color: 03db12
-  name: status/approved
+  name: approved
+  previously:
+  - name: status/approved
 - color: bc9090
   name: status/backlog
 - color: fca42e
   name: status/done
 - color: '808080'
   name: status/icebox
+# Don't remove, this label is being used by prow
 - color: ffa500
-  name: status/in progress
+  name: do-not-merge/work-in-progress
   previously:
-  - name: do-not-merge/work-in-progress
+  - name: status/in progress
 - color: 2efca4
-  name: status/lgtm
+  name: lgtm
+  previously:
+  - name: status/lgtm
 - color: 00daff
   name: testing
   previously: