Update AMI tests to cover Ubuntu system with yum-utils package scenario (#578)
Update AMI tests to cover Ubuntu system with yum-utils package scenario (#578)

* Update AMI tests script so we also test a scenaro where there is
yum-utils package installed on Ubuntu system.

Previously our installer script didn't correctly handler this scenario.
scalyr/scalyr-agent-2,scalyr/scalyr-agent-2,scalyr/scalyr-agent-2,imron/scalyr-agent-2,scalyr/scalyr-agent-2