Improvement - ELK Based Analytics Installation Guide

[Tharanidk]

Description:

Need to add the below jason objects with descriptive details to the documentation.

apim_event_response:
{
  "apiCreator": "admin",
  "apiCreatorTenantDomain": "carbon.super",
  "apiId": "43d030dc-427f-4678-98e3-87b7d9882b5f",
  "apiMethod": "GET",
  "apiName": "SampleAPI",
  "apiResourceTemplate": "/*",
  "apiType": "HTTP",
  "apiVersion": "1.0.0",
  "applicationId": "2d6c54b0-7c7d-4b50-83dc-e6ae6f88962e",
  "applicationName": "DefaultApplication",
  "applicationOwner": "admin",
  "backendLatency": 13,
  "correlationId": "79ed20c3-55b1-434a-adf6-eea25e2d09c3",
  "destination": "http://192.168.114.51:8281/services/sampleAPIBackend",
  "eventType": "response",
  "gatewayType": "SYNAPSE",
  "keyType": "SANDBOX",
  "platform": "Mac OS X",
  "properties":{},
  "apiContext":"/api1/2.0.0",
  "userName":"admin@carbon.super"
  "proxyResponseCode": 202,
  "regionId": "default",
  "requestMediationLatency": 54,
  "requestTimestamp": "2022-01-20T03:34:36.451Z",
  "responseCacheHit": false,
  "responseLatency": 73,
  "responseMediationLatency": 6,
  "targetResponseCode": 202,
  "userAgent": "Chrome",
  "userIp": "172.16.2.70"
}

apim_event_faulty:
{
   "apiCreator": "admin",
   "apiCreatorTenantDomain": "carbon.super",
   "apiId": "43d030dc-427f-4678-98e3-87b7d9882b5f",
   "apiName": "SampleAPI",
   "apiType": "HTTP",
   "apiVersion": "1.0.0",
   "applicationId": "0b5ccc91-30e2-4ee5-9355-d1698075c028",
   "applicationName": "SampleApp3",
   "applicationOwner": "admin",
   "correlationId": "ccf2196f-9db8-429b-aaae-98f4c6edf6d7",
   "errorCode": 900803,
   "errorMessage": "APPLICATION_LEVEL_LIMIT_EXCEEDED",
   "errorType": "THROTTLED",
   "eventType": "fault",
   "gatewayType": "SYNAPSE",
   "keyType": "PRODUCTION",
   "proxyResponseCode": 429,
   "regionId": "default",
   "requestTimestamp": "2022-02-01T04:18:48.023Z",
   "responseCacheHit": false,
   "targetResponseCode": -1
}