@Override
  protected final void postSetUp() throws Exception {
    RegionVersionHolder.BIT_SET_WIDTH = 4;
    postSetUpRegionVersionHolderSmallBitSetJUnitTest();
  }
A test of the region version holder, but using a smaller bit set so that we test the merging of
exceptions functionality.
geode-core/src/test/java/org/apache/geode/internal/cache/versions/RegionVersionHolderSmallBitSetJUnitTest.java