FEATURE: When executing install tests, also install package variants #164
Description
Python wheel packages like pyTooling support package extras like:
pyTooling[yaml]pyTooling[terminal]pyTooling[doc]pyTooling[test]pyTooling[all]
Variants can also be combined like:
pyTooling[yaml,terminal]
It should be possible to specify a list of variants for installation testing in InstallPackage.yml