(refactor): Rename drain_node experiment to node_drain (#107)

Signed-off-by: shubhamchaudhary <shubham.chaudhary@mayadata.io>

charts/generic/node-drain/experiment.yaml

@@ -0,0 +1,64 @@
+---
+apiVersion: litmuschaos.io/v1alpha1
+description:
+  message: |
+    Drain the node where application pod is scheduled
+kind: ChaosExperiment
+metadata:
+  name: node-drain
+  version: 0.1.2
+spec:
+  definition:
+    scope: Cluster
+    permissions:
+      - apiGroups:
+          - ""
+          - "batch"
+          - "extensions"
+          - "litmuschaos.io"
+        resources:
+          - "jobs"
+          - "pods"
+          - "pods/eviction"
+          - "daemonsets"
+          - "chaosengines"
+          - "chaosexperiments"
+          - "chaosresults"
+        verbs:
+          - "create"
+          - "list"
+          - "get"
+          - "patch"
+          - "delete"
+      - apiGroups:
+          - ""
+        resources: 
+          - "nodes"
+        verbs :
+          - "get"
+          - "list"
+          - "patch"
+    image: "litmuschaos/ansible-runner:ci"
+    args:
+    - -c
+    - ansible-playbook ./experiments/generic/node_drain/node_drain_ansible_logic.yml -i /etc/ansible/hosts -vv; exit 0
+    command:
+    - /bin/bash
+    env:
+    - name: ANSIBLE_STDOUT_CALLBACK
+      value: 'default'
+
+    - name: LIVENESS_APP_LABEL
+      value: ''
+    
+    - name: APP_NODE
+      value: ''
+
+    - name: TOTAL_CHAOS_DURATION
+      value: '60'
+
+    - name: LIVENESS_APP_NAMESPACE
+      value: '' 
+
+    labels:
+      name: node-drain

charts/generic/node-drain/node-drain.chartserviceversion.yaml

@@ -0,0 +1,42 @@
+apiVersion: litmuchaos.io/v1alpha1
+kind: ChartServiceVersion
+metadata:
+  name: node-drain
+  version: 0.1.4
+  annotations:
+    categories: Kubernetes
+    vendor: Mayadata
+    repository: https://github.com/litmuschaos/chaos-charts
+    support: https://app.slack.com/client/T09NY5SBT/CNXNB0ZTN
+spec:
+  displayName: node-drain
+  categoryDescription: >
+    Drain the node where application pod is scheduled
+  keywords:
+    - Kubernetes
+    - Node 
+    - State
+  platforms:
+    - GKE
+    - AWS(KOPS)
+    - Packet(Kubeadm)
+    - Konvoy
+  maturity: alpha
+  chaosType: infra
+  maintainers:
+    - name: shubham chaudhary
+      email: shubham.chaudhary@mayadata.io
+  minKubeVersion: 1.12.0
+  provider:
+    name: Mayadata
+  links:
+    - name: Kubernetes Website
+      url: https://kubernetes.io
+    - name: Source Code
+      url: https://github.com/litmuschaos/litmus/tree/master/experiments/generic
+    - name: Docs
+      url: https://docs.litmuschaos.io/docs/node-drain/
+  icon:
+    - url: ""
+      mediatype: ""
+  chaosexpcrdlink: https://raw.githubusercontent.com/litmuschaos/chaos-charts/master/charts/generic/node-drain/experiment.yaml