public Builder awaitTerminationBeforeShutdown() {
      awaitTerminationBeforeShutdown = true;
      return this;
    }
Specifies invocation of {@code awaitTermination} before {@code shutdown} or
{@code shutdownNow}.

@return a reference to this Builder
geode-dunit/src/main/java/org/apache/geode/test/dunit/rules/DistributedExecutorServiceRule.java