chore(new-chart): Add chaos chart for pod network duplication (#253)

Signed-off-by: Udit Gaurav <uditgaurav@gmail.com>

charts/generic/pod-network-duplication/engine.yaml

@@ -0,0 +1,43 @@
+# chaosengine.yaml
+apiVersion: litmuschaos.io/v1alpha1
+kind: ChaosEngine
+metadata:
+  name: nginx-network-chaos
+  namespace: default
+spec:
+  # It can be delete/retain
+  jobCleanUpPolicy: 'delete'
+  # It can be true/false
+  annotationCheck: 'true'
+  # It can be active/stop
+  engineState: 'active'
+  #ex. values: ns1:name=percona,ns2:run=nginx 
+  auxiliaryAppInfo: ''
+  monitoring: false
+  appinfo: 
+    appns: 'default'
+    # FYI, To see app label, apply kubectl get pods --show-labels
+    applabel: 'app=nginx'
+    appkind: 'deployment'
+  chaosServiceAccount: pod-network-duplication-sa 
+  experiments:
+    - name: pod-network-duplication
+      spec:
+        components:
+          env:
+            - name: TOTAL_CHAOS_DURATION
+              value: '60' # in seconds
+
+            - name: LIB_IMAGE
+              value: 'gaiaadm/pumba:0.6.5'
+
+            #Network interface inside target container
+            - name: NETWORK_INTERFACE
+              value: 'eth0'    
+
+            - name: NETWORK_PACKET_DUPLICATION_PERCENTAGE
+              value: '100'
+            
+            #If not provided it will take the first container of the target pod
+            - name: TARGET_CONTAINER
+              value: ''