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

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

charts/openebs/openebs-pool-disk-loss/experiment.yaml

@@ -94,6 +94,7 @@ spec:
         
     labels:
       name: openebs-pool-disk-loss
+      app.kubernetes.io/part-of: litmus
 
     configmaps:
     - name: openebs-pool-disk-loss

charts/openebs/openebs-pool-disk-loss/rbac.yaml

@@ -6,6 +6,7 @@ metadata:
   namespace: default
   labels:
     name: pool-disk-loss-sa
+    app.kubernetes.io/part-of: litmus
 ---
 # Source: openebs/templates/clusterrole.yaml
 apiVersion: rbac.authorization.k8s.io/v1
@@ -14,6 +15,7 @@ metadata:
   name: pool-disk-loss-sa
   labels:
     name: pool-disk-loss-sa
+    app.kubernetes.io/part-of: litmus
 rules:
 - apiGroups: ["","apps","litmuschaos.io","batch","extensions","storage.k8s.io","openebs.io"]
   resources: ["pods", "pods/log", "jobs", "events", "pods/exec", "cstorpools", "configmaps", "secrets", "storageclasses", "persistentvolumes", "persistentvolumeclaims", "cstorvolumereplicas", "chaosexperiments", "chaosresults", "chaosengines"]
@@ -25,6 +27,7 @@ metadata:
   name: pool-disk-loss-sa
   labels:
     name: pool-disk-loss-sa
+    app.kubernetes.io/part-of: litmus
 roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: ClusterRole
@@ -32,4 +35,4 @@ roleRef:
 subjects:
 - kind: ServiceAccount
   name: pool-disk-loss-sa
-  namespace: default
+  namespace: default