Fix Quickstart

[agardnerIT]

This PR will fix the Quickstart tutorial as mentioned in #227

Lessons learned

1. The auto remediation use case cannot be run without the multi-stage delivery because podtatohead-production won't exist. Docs should be updated to mention that the flow is: Keptn hello world > multi stage delivery > auto remediation

Things Fixed

• Updated images to latest ones & now uses keptncontrib repo images not images stored in a @johannes-b's repo.
• Added a check in autoremediation shell script to only install JES if it doesn't already exist

Outstanding Items Before Merging PR

• Currently the JES pod fails with The connection to the server localhost:8080 was refused @christian-kreuzberger-dtx will probably immediately spot the issue that I'm missing :)

{
  "data": {
    "message": "Job job-executor-service-job-6e3b00dc-5586-45d7-9ce6-635c-1 failed: job job-executor-service-job-6e3b00dc-5586-45d7-9ce6-635c-1 failed. Reason: BackoffLimitExceeded, Message: Job has reached the specified backoff limit\n\nLogs: \nThe connection to the server localhost:8080 was refused - did you specify the right host or port?\n",
    "project": "podtatohead",
    "result": "fail",
    "service": "helloservice",
    "stage": "production",
    "status": "errored"
  },
  "id": "4a31e0f7-43c7-448a-af8b-02bb069489e4",
  "shkeptncontext": "2461cd3f-5c4f-48bc-8063-f32ba5f7f5cb",
  "shkeptnspecversion": "0.2.4",
  "source": "shipyard-controller",
  "specversion": "1.0",
  "time": "2022-03-14T09:53:43.722Z",
  "triggeredid": "c063b994-dad8-4e0c-a565-62644dca9f0c",
  "type": "sh.keptn.event.production.remediation.finished"
}

[oleg-nenashev]

Everything looks good, thanks for the fix!

[agardnerIT]

Please re-open until we reach DoD above

[oleg-nenashev]

oops, have not noticed before-the-merge warning. Should I revert?