Jonathan Rosser f1ed3f5dc9 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: I42e40adc20a122ea5bba292b1f6fea9e79b3c365
2022-01-13 19:45:26 +02:00
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