CentOS installations might have "apt" as "annotation processing tool"…

[thorleifjacobsen]

Fixes so it checks for apt-get on ubuntu installations. Less chance of collision with other tools named "apt".

Describe your changes

Changed so it checks for command -v apt-get which is commands they use for APT instead of command -v apt which is also a part of java tools apt (1) - annotation processing tool

This makes some linux version think it is APT when it might not is.

Issue ticket number and link

Checklist

• Is it a bug fix
• Is a typo/documentation fix
• Is a feature enhancement
• It is a refactor
• Created tests that fail without the change (if possible)
• Extended the README / documentation, if necessary

[CLAassistant]

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