[UIMA-3774] [UIMA-3784] fix size calc, rework design for less sync contention, better lock design, add test comparing to plain concurrenthashmap pseudo design (pseudo in that it doesn't really quite work)

git-svn-id: https://svn.apache.org/repos/asf/uima/uimaj/trunk@1591466 13f79535-47bb-0310-9956-ffa450edef68