Fix tempest config options
Fix tempest config options

The tempest configuration step was adjusted to
conform with the new option type for --config-options.

For now assuming that all the config options will be provided as
a 2-level dict: { section_name: { option_name: value }}.

Change-Id: I6778c0ebc6111e158edd2c77e763a642f4c4f53b

okolisny/InfraRed,redhat-openstack/infrared,redhat-openstack/infrared,okolisny/InfraRed,okolisny/InfraRed,redhat-openstack/infrared