Test coverage improvements: Patch upstream change 38596

Patches upstream change:

http://bugs.icu-project.org/trac/browser/icu4j/branches/fabalbon/56-1-test-coverage?rev=38596

Bug: 22023363

(cherry picked from commit efa71e94028eb46b60217b3e5b1a01cb7b82c1dd)

Change-Id: I3f988062e6689331927a93fddbeb8b79bed6960f
6 files changed