BIGTOP-1381  Debian Source Package names
Gradle remove symlinks
Create necessary dirs
Copy packages.debian.tar.xz as well
BIGTOP-1179. Add Apache Tez to bigtop
Remove MAVEN3_HOME environment since it is not used otherwise
Use tez stable
tez update
create checksum files when installing files into maven repository
Merge branch 'olaf' of github.com:oflebbe/bigtop into olaf