Change working_dir to work_dir in create_container

[kevinwylder]

#118

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: kevinwylder
To complete the pull request process, please assign rhatdan after the PR has been reviewed.
You can assign the PR to them by writing /assign @rhatdan in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[jwhonce]

@kevinwylder Please sign your commit, thanks.

git commit -a --amend -s
git push --force

LGTM

[rhatdan]

Thanks @kevinwylder
LGTM