Java skiplists maxLevel/maxHeight should not be hardcoded.

[harrisonrodgers]

Overview:

Most algorithms such as SequentialSkipListIntSet, CompositionalSkipListIntSet, TransactionalPughSkipListSet, and LazySkipList, currently use a hardcoded maxLevel/maxHeight.

Some algorithms like the NonBlockingFriendlySkipListMap have maintenance code to increase the level/height of the structure. Or are implemented using nodes for each level/height which are linked up and down, instead of pseudo-nodes.

Problem:

If the hardcoded maxLevel/maxHeight is

1. smaller than log2(range) then the logarithmic nature of the skiplist is not maintained
2. too large then structures which use an array of next pointers in their nodes are making their nodes unnecessarily large

Solution:

Update src/contention/benchmark/Test.java to create the skiplists with parameter log2(range), thus allowing the skiplists to use an appropriate maxLevel/maxHeight for the benchmark.