#657: fix installation of java 8

[hohwille]

fixes #657

• improved VersionIdentifierTest and also make the problem transparent
• removed version validator to fix the actual bug Cannot install Java 8 #657

[coveralls]

Pull Request Test Coverage Report for Build 11103685641

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 66.142%

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Totals
Change from base Build 11074150869:	0.03%
Covered Lines:	6083
Relevant Lines:	8851

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💛 - Coveralls

[jan-vcapgemini]

Looks good to me, ready to merge. Will we reactivate it later? if yes, we need to add a new issue with the removed code part.

[hohwille]

Will we reactivate it later?

This is not planned since it seems we need to support versions that have unclear lifecycle phases or are otherwise not what we consider valid. The question is rather if we can remove the isValid() method at all since it is not practically used.