Solve version dependent configuration changes

[widhalmt]

In this collection, elastic_release is an integer, not a version. We have a version variable, that's not always used and can be filled with latest.

So checks like a5c88d4 are very helpful bon't won't work with the current implementation.

There could be a combined solution for this issue and #236 . So set a variable that contains the actual or desired version and then use it for checks like the one in jvm.options. For now I have to deactivate the checks because they create illegal code for version 7.