[artifactory] Always set 'Use credentials' flag

    Formula supports credential-based artifactory authorization only.
    So need to set `Use the Credentials Plugin` parameter
    unconditionally

    Closes-PROD: https://mirantis.jira.com/browse/PROD-21302

Change-Id: I6218ab89e2347614d1c15ee48a6297e392341cee
1 file changed