Siamak Sadeghianfar

### Feature request The `TektonConfig` CR provides a convenient UX for configuring the behaviour of various Tetkon components on the cluster however the UX is inconsistent across various attributes: ```...

https://github.com/tektoncd/pipeline/pull/3081

Display message for read-only mode

1

Check if user is able to create resources and if not, inform user that they can only view objects. Actions that require create privileges should get disabled for the user.

Add structural OpenAPI schema to Tekton CRDs

32

Kubernetes 1.15 introduced [structural OpenAPI schema](https://kubernetes.io/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definitions/#specifying-a-structural-schema) which helps with validation, supporting `kubectl explain` and also building tools around it: Structural schema should be added for all CRDs introduced by Tekton.

Add a command to retrieve the webhook url

2

A CLI command that retrieves the webhook URL would be useful instead of running `oc get route`.

The `centos_jdk8` recipe overrides `MAVEN_OPTS` environment variable and makes is impossible to set it via the stack json: https://github.com/eclipse/che-dockerfiles/blob/master/recipes/centos_jdk8/Dockerfile#L34