chore(lib): Add pumba lib image for pod-cpu-hog (#314)

Signed-off-by: Udit Gaurav <udit.gaurav@mayadata.io>

charts/generic/pod-cpu-hog/rbac.yaml

@@ -17,7 +17,7 @@ metadata:
 rules:
 - apiGroups: ["","litmuschaos.io","batch"]
   resources: ["pods","jobs","events","pods/log","pods/exec","chaosengines","chaosexperiments","chaosresults"]
-  verbs: ["create","list","get","patch","update","delete"]
+  verbs: ["create","list","get","patch","update","delete","deletecollection"]
 ---
 apiVersion: rbac.authorization.k8s.io/v1beta1
 kind: RoleBinding