Update 3_configuration.rst
Update 3_configuration.rst
miguel0afd/crossdata,jjlopezm/crossdata,compae/Crossdata,luismcl/crossdata,gserranojc/Crossdata,gserranojc/Crossdata,pmadrigal/Crossdata,miguel0afd/crossdata,compae/Crossdata,hdominguez1989/Crossdata,luismcl/crossdata,jjlopezm/crossdata,darroyocazorla/crossdata,Stratio/crossdata,hdominguez1989/Crossdata,Stratio/crossdata,darroyocazorla/crossdata,pmadrigal/Crossdata