(QENG-600) Install lsb-release package if needed

For Debian and Ubuntu systems, check if lsb-release package is
installed. Install if needed. This package is needed to correctly
determine the release packages of puppet to install on the SUT.
This package is not present on a minimal Debian 7 installation.
(QENG-600) Change package install call to host.package_install
Merge pull request #225 from johnduarte/QENG-600

(QENG-600) Install lsb-release package if needed