Jonathan Rosser e4d8d7836e Remove references to unsupported operating systems
All references to Gentoo, SUSE, Debian stretch and Centos-7  are removed.
Conditional tasks, ternary operators and variables are simplified where possible
OS specific variables files are generalised where possible

Change-Id: I8ccd8ef5cbb4a29b782418ffa33e635962f0941e
2021-03-21 21:06:47 +01:00
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