Fixes another ConcurrentHistogram race, adds asserts

 - Fixes race condition in normalization of index while resizing is ongoing (could end up using wrong array length)

 - Adds asserts for inactive & active lengths being equal to countsArrayLength outside of readLock protected regions
Cleans up resize (updates highestTrackableValue) and tests

 - Change to make highestTrackableValue refelect resize correctly

 - Changed concurrent autosizing test to reproduce old (now fixed) concurrent resize races