Use build_opener() in get_cve_input.py, it's simpler and honors proxy settings
Use build_opener() in get_cve_input.py, it's simpler and honors proxy settings

See https://bugzilla.redhat.com/show_bug.cgi?id=1351952

redhatrises/openscap,OpenSCAP/openscap,OpenSCAP/openscap,Hexadorsimal/openscap,OpenSCAP/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,redhatrises/openscap,redhatrises/openscap,OpenSCAP/openscap,jan-cerny/openscap,jan-cerny/openscap,redhatrises/openscap,ybznek/openscap,jan-cerny/openscap,ybznek/openscap,mpreisler/openscap,redhatrises/openscap,Hexadorsimal/openscap,jan-cerny/openscap,ybznek/openscap,jan-cerny/openscap,Hexadorsimal/openscap,mpreisler/openscap,ybznek/openscap,jan-cerny/openscap,ybznek/openscap,mpreisler/openscap,mpreisler/openscap,mpreisler/openscap,OpenSCAP/openscap,redhatrises/openscap,ybznek/openscap,mpreisler/openscap,OpenSCAP/openscap,Hexadorsimal/openscap