fix: Make workspace commands works for single-user mode

[tolusha]

Signed-off-by: Anatolii Bazko abazko@redhat.com

What does this PR do?

It makes workspace commands works for single-user mode

What issues does this PR fix or reference?

eclipse-che/che#18406

How to test this PR?

1. Deploy Eclipse che in single-user mode chectl server:deploy --platform minikube --installer helm
2. Use workspace commands

PR Checklist

As the author of this Pull Request I made sure that:

• The Eclipse Contributor Agreement is valid
• Code produced is complete
• Code builds without errors
• Tests are covering the bugfix
• The repository devfile is up to date and works
• Sections What issues does this PR fix or reference and How to test this PR completed
• Relevant user documentation updated
• Relevant contributing documentation updated
• CI/CD changes implemented, documented and communicated

Reviewers

Reviewers, please comment how you tested the PR when approving it.

[AndrienkoAleksandr]

How did I test it:
Installed single user che with patch:

  server:
    customCheProperties:
      CHE_MULTIUSER: "false"

Executed login:

[user@localhost bin]$ ./run auth:login
› Current Kubernetes context: 'minikube'
Using https://che-che.**minikube-ip**.nip.io/api server API URL to log in
Authentication is not supported on the server: "https://che-che.**minikube-ip**.nip.io/api"

Error like expected, because there is no login for single user

Created workspace:

[user@localhost bin]$ ./run workspace:create -f ../devfile.yaml
› Current Kubernetes context: 'minikube'
Workspace has been successfully created:
https://che-che.**minikube-ip**.nip.io/dashboard/#/ide/che/chectl-dev

Got list workspaces:

[user@localhost bin]$ ./run workspace:list
› Current Kubernetes context: 'minikube'
Id                        Name       Namespace Status  Created                  Updated 
workspace0ocq1bww0gb2xuj8 chectl-dev che       STOPPED 2020-11-19T16:27:05.374Z  

Started workspace by id from list:

[user@localhost bin]$ ./run workspace:start workspace0ocq1bww0gb2xuj8
› Current Kubernetes context: 'minikube'
Workspace start request has been sent, workspace will be available shortly:
https://che-che.**minikube-ip**.nip.io/dashboard/#/ide/che/chectl-dev

Stopped workspace:

[user@localhost bin]$ ./run workspace:stop workspace0ocq1bww0gb2xuj8
› Current Kubernetes context: 'minikube'
Workspace successfully stopped.

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: AndrienkoAleksandr, mmorhun, tolusha
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[openshift-merge-robot]

@tolusha: The following tests failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
ci/prow/v4-chectl-e2e	6a108af	link	/test v4-chectl-e2e
ci/prow/v5-chectl-e2e	6a108af	link	/test v5-chectl-e2e

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[openshift-ci-robot]

New changes are detected. LGTM label has been removed.