Correct transaction management. cf. bug https://openrdf.atlassian.net/browse/SES-2295 and tomcat default management of PUT request with form data (application/x-www-form-urlencoded encoded)
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.travis.yml:
forge_password: "GYBg84VC7Mx8BhAJ/56VjPU8tctatVVafGjuM9rJVmvJpbHkTz+XORHkvdVxCCkAkiq0/NZjwWpbxkQGMz0MxnXT5V/H90+h6YRHnWIEEqlW+5dR76uKZ9mO65cqk+l8UA+GUr5ZWKTS0fEJzjNR8aFM56DaM1u+SWIfjBXfE0k="