private void waitForDestroy(Region.Entry entry, long p_tilt) {
    waitForDestroy(entry, p_tilt, 100);
  }
Since <em>tilt</em> is the earliest time we expect, one must check the current time
<em>before</em> invoking the operation intended to keep the entry alive.

@param entry entry we want to be invalidated
@param p_tilt earliest time we expect to see the invalidate
geode-dunit/src/main/java/org/apache/geode/cache30/RegionTestCase.java