(enhancement)charts: add standard kubernetes labels to experiments (#346)

Signed-off-by: ksatchit <karthik.s@mayadata.io>

charts/generic/pod-io-stress/experiment.yaml

@@ -78,4 +78,5 @@ spec:
         value: 'parallel'
 
     labels:
-      name: pod-io-stress
+      name: pod-io-stress
+      app.kubernetes.io/part-of: litmus

charts/generic/pod-io-stress/rbac.yaml

@@ -6,6 +6,7 @@ metadata:
   namespace: default
   labels:
     name: pod-io-stress-sa
+    app.kubernetes.io/part-of: litmus
 ---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: Role
@@ -14,6 +15,7 @@ metadata:
   namespace: default
   labels:
     name: pod-io-stress-sa
+    app.kubernetes.io/part-of: litmus
 rules:
 - apiGroups: ["","litmuschaos.io","batch"]
   resources: ["pods","jobs","events","pods/log","pods/exec","chaosengines","chaosexperiments","chaosresults"]
@@ -26,6 +28,7 @@ metadata:
   namespace: default
   labels:
     name: pod-io-stress-sa
+    app.kubernetes.io/part-of: litmus
 roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: Role