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Setup networking so that you can connect to your Jenkins VM on port 8080 (or whatever you set it to in the Ansible playbook) and login with your linaro.org ldap account (with @linaro.org at the end).
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Then you can login to MrP on port 5000 5000 (or whatever you set it to in the Ansible playbook) and login with the usual first install login (admin:linaro).