(QE-725) Minor code cleanup and EZBakeUtils fix.

* Fixes defaultsdir argument passed to make in `install_from_ezbake` for debian
  systems.
* Adds `--force-yes` to apt-get calls when installing packages on debian.
* Minor code cleanup when interpreting package and version information from
  `ezbake_config`

Signed-off-by: Wayne <wayne@puppetlabs.com>