Add dpkg tools to manage Ubuntu repo from CentOS

dpkg-scanpackages has similar functionality as
apt-ftparchive but has port to CentOS6.x

Related-Bug: 1358785
Implements: blueprint testing-packages-in-enviroment

Change-Id: I39e126dd02c84787602944a01d9f309754a510ca
Merge "Add dpkg tools to manage Ubuntu repo from CentOS"