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

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+# 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: ''

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

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+apiVersion: litmuschaos.io/v1alpha1
+description:
+  message: |
+    Injects network packet duplication on pods belonging to an app deployment
+kind: ChaosExperiment
+metadata:
+  name: pod-network-duplication
+  version: 0.1.0
+spec:
+  definition:
+    scope: Namespaced
+    permissions:
+    - apiGroups:
+        - ""
+        - "batch"
+        - "litmuschaos.io"
+      resources:
+        - "jobs"
+        - "pods"
+        - "pods/log"
+        - "events"
+        - "chaosengines"
+        - "chaosexperiments"
+        - "chaosresults"
+      verbs:
+        - "get"
+        - "list"
+        - "patch"
+        - "create"
+        - "update"
+        - "delete"
+    image: "litmuschaos/go-runner:latest"
+    args:
+    - -c
+    - ./experiments/pod-network-duplication
+    command:
+    - /bin/bash
+    env:
+    - name: TOTAL_CHAOS_DURATION
+      value: '60'
+    - name: RAMP_TIME
+      value: ''
+    - name: TARGET_CONTAINER
+      value: ''
+    - name: NETWORK_INTERFACE
+      value: 'eth0'
+    - name: NETWORK_PACKET_DUPLICATION_PERCENTAGE
+      value: '100' # in percentage
+    - name: LIB
+      value: 'pumba'      
+    - name: LIB_IMAGE
+      value: 'gaiaadm/pumba:0.6.5'
+    labels:
+      name: pod-network-duplication

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

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+apiVersion: litmuchaos.io/v1alpha1
+kind: ChartServiceVersion
+metadata:
+  createdAt: 2020-07-01T10:28:08Z
+  name: pod-network-duplication
+  version: 0.1.0
+  annotations:
+    categories: Kubernetes
+    vendor: CNCF
+    support: https://slack.kubernetes.io/
+spec:
+  displayName: pod-network-duplication
+  categoryDescription: |
+    Pod-network-duplication contains chaos to disrupt network connectivity to kubernetes pods. Experiments can inject percentage packet duplication on the app replica pods. 
+    - Causes lossy access to application replica by injecting packet duplication using pumba.
+    - The application pod should be healthy once chaos is stopped. Service-requests should be served (say, via alternate replicas) despite chaos.
+  keywords:
+    - Kubernetes
+    - Network
+    - Duplication
+  platforms:
+    - GKE
+    - Minikube 
+    - Packet(Kubeadm)
+    - EKS
+  maturity: alpha
+  maintainers:
+    - name: Udit Gaurav
+      email: udit.gaurav@mayadata.io
+  minKubeVersion: 1.12.0
+  provider:
+    name: Mayadata
+  links:
+    - name: Source Code
+      url: https://github.com/litmuschaos/litmus-go/tree/master/experiments/generic/pod-network-duplication
+    - name: Documentation
+      url: https://docs.litmuschaos.io/docs/pod-network-duplication/
+    - name: Video
+      url: 
+  icon:
+    - base64data: ""
+      mediatype: ""
+  chaosexpcrdlink: https://raw.githubusercontent.com/litmuschaos/chaos-charts/master/charts/generic/pod-network-duplication/experiment.yaml 

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

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+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: pod-network-duplication-sa
+  namespace: default
+  labels:
+    name: pod-network-duplication-sa
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: Role
+metadata:
+  name: pod-network-duplication-sa
+  namespace: default
+  labels:
+    name: pod-network-duplication-sa
+rules:
+- apiGroups: ["","litmuschaos.io","batch"]
+  resources: ["pods","jobs","events","pods/log","chaosengines","chaosexperiments","chaosresults"]
+  verbs: ["create","list","get","patch","update","delete"]
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: RoleBinding
+metadata:
+  name: pod-network-duplication-sa
+  namespace: default
+  labels:
+    name: pod-network-duplication-sa
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: pod-network-duplication-sa
+subjects:
+- kind: ServiceAccount
+  name: pod-network-duplication-sa
+  namespace: default