BZ 1145292 - Heap max size is variable, not trait

For PS Eden size, there is a new value every time this metric is collected. It
should not be a trait, and probably should be only captured very infrequently.

Reduce frequency by moving summary to detail for other pool data.
Merge pull request #138 from genman/bug/1145292

BZ 1145292 - Heap max size is variable, not trait

Agreed these traits should be turned into numeric metrics.