travis: replace build step from script to before_script
travis: replace build step from script to before_script

Fiware/data.Orion,Fiware/data.Orion,Fiware/data.Orion,telefonicaid/fiware-orion,telefonicaid/fiware-orion,Fiware/data.Orion,Fiware/data.Orion,telefonicaid/fiware-orion,telefonicaid/fiware-orion,telefonicaid/fiware-orion,telefonicaid/fiware-orion,Fiware/data.Orion