public abstract boolean reapContainer(ContainerReapContext ctx)
      throws IOException;
@Test
  public void testReapContainer() throws Exception {
    Container container = mock(Container.class);
    ContainerReapContext.Builder builder =  new ContainerReapContext.Builder();
    builder.setContainer(container).setUser("foo");
    assertTrue(containerExecutor.reapContainer(builder.build()));
  }