OutputSpec.matchesThisVm better supports version ranges

OutputSpec.matchesThisVm better supports version ranges

vmVersionRanges might be a single version like "9", a list of versions
like "1.2,1.3,1.4,1.5", an equivalent range of "1.2-1.5", an open range
like "-1.8", "9-" (equivalent to "9+") or a more complex list of ranges
like "-1.6,9-11,13-14,17-" or "8,11,16+".

Empty ranges like in "", " ",  "8,,14", ",5", "6-," will be ignored.
I.e., they will not yield a positive match.

Bogus ranges like "9-11-14" will be ignored, too.

Existing XML test specs using '<line text="..." vm="v,v2,...,vn"/>
have been adjusted to use version ranges rather than long lists of
consecutive versions. Furthermore, ranges with a trailing '+' like '14+'
were replaced by using the new canonical format '14-', even though the
parser still correctly recognises '14+'.

Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>