Updated openstack/openstack
Project: openstack/tempest  c314af361787ec0343109c917765c527f7139a58

Backward compatibility to credentials in conf

Before switching to the YAML based configuration as the default for
credentials, we need to introduce backward compatibility to allow
credentials to be configured in tempest.conf.

Partially implements bp:test-accounts

Change-Id: I29c66c87d02f442b1d5b0b2d7c82ff2a140c111f