upgrading pumba to 0.6.5 in all container kill charts (#200)

Signed-off-by: Raj <raj.das@mayadata.io>

charts/openebs/openebs-pool-container-failure/experiment.yaml

@@ -63,9 +63,9 @@ spec:
       value: ''
 
     # only pumba supported
-    # For pumba image use : gaiaadm/pumba:0.4.8
+    # For pumba image use : gaiaadm/pumba:0.6.5
     - name: LIB_IMAGE  
-      value: 'gaiaadm/pumba:0.4.8' 
+      value: 'gaiaadm/pumba:0.6.5' 
 
     - name: LIVENESS_APP_NAMESPACE
       value: '' 
@@ -88,5 +88,4 @@ spec:
       name: openebs-pool-container-failure
     #configmaps:
     #- name: openebs-pool-container-failure
-    #  mountPath: /mnt
-  
+    #  mountPath: /mnt