Allow deployments from UI and deprecate rest2tasks

[rocketeerbkw]

Checklist

• Affected Issues have been mentioned in the Closing issues section
• Documentation has been written/updated.
• Changelog entry has been written

API

New mutations added to the API to trigger deployments. Examples:

# Deploy latest code for an environment that already exists
mutation deployEnvironmentLatest {
  deployEnvironmentLatest (input: {
    environment: {
      name: "nginx"
      project: {
        name: "ci-nginx"
      }
    }
  })
}

# Deploy latest or specific commit for an environment that does or does not already exist
mutation deployEnvironmentBranch {
  deployEnvironmentBranch(input:{
    project: {
      name: "ci-nginx"
    }
    branchName: "nginx"
    branchRef: "b82sx9234"
  })
}

mutation deployEnvironmentPullrequest {
  deployEnvironmentPullrequest(input: {
    project: {
      name: "ci-nginx"
    }
    number: 5
    title: "111 Add New Feature"
    baseBranchName: "master"
    baseBranchRef: "origin/master"
    headBranchName: "111-add-new-feature"
    headBranchRef: "origin/111-add-new-feature"
  })
}

mutation deployEnvironmentPromote {
  deployEnvironmentPromote(input: {
    sourceEnvironment: {
      name: "source"
      project: {
        name: "ci-features"
      }
    }
    branchName:"target"
    project: {
      name:"ci-features"
    }
  })
}

In order to facilitate deployments, new information is tracked for environments and is now required when creating/updating them. Example:

"environmentByOpenshiftProjectName": {
  "id": 3,
  "openshiftProjectName": "high-cotton-master",
  "name": "Master",
  "deployType": "branch",
  "deployTitle": null,
  "deployBaseRef": "Master",
  "deployHeadRef": null
}

UI

Environments that have been configured with deployment information will have a new button on the deployments page to trigger a deploy of the latest code for that environment.

Changelog Entry

Feature - API has new mutations for triggering deployments
Change - API requires new deployment information when creating/updating environments
Improvement - UI can now trigger new deployments for environments (#838)
Change - rest2tasks is deprecated in favor of API

Deployment notes

For existing environments, at lest one deployment must happen via non-ui methods before the "deploy" button will show up in the ui. New environments will get the button immediately.

Closing issues

Closes #838

[Schnitzel]

very nice work! just some small adaptions and unfortunately we have some conflicts now :(

[rocketeerbkw]

I rebased to fix the conflicts, will wait for tests to come back while I test locally.

[rocketeerbkw]

All green for me locally

[Schnitzel]

ugh, another Conflict now :( @rocketeerbkw can you have another look? thank you