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

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

charts/generic/pod-memory-hog/experiment.yaml

@@ -37,7 +37,7 @@ spec:
     - /bin/bash
     env:
       - name: TOTAL_CHAOS_DURATION
-        value: '30'
+        value: '60'
 
       - name: CHAOS_INTERVAL
         value: '10'
@@ -55,10 +55,14 @@ spec:
         value: ''     
 
       ## env var that describes the library used to execute the chaos
-      ## default: litmus. Supported values: litmus, powerfulseal, chaoskube
+      ## default: litmus. Supported values: litmus, pumba
       - name: LIB
         value: 'litmus'
 
+      ## It is used in pumba lib only    
+      - name: LIB_IMAGE
+        value: 'gaiaadm/pumba'
+
       - name: TARGET_POD
         value: ''
 

charts/generic/pod-memory-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