public String getPersistentTaskDefinition() {
    return ecs.getPersistentTaskDefinition();
  }
Facade over everything in an end-to-end Blox stack that's needed in tests.

<p>TODO: it makes more sense to wire the individual support classes into the unit tests instead
of this whole stack, so this will probably be removed soon.
end-to-end-tests/src/main/java/com/amazonaws/blox/integ/BloxTestStack.java