public HttpResponseAssert doGetAndAssert(String uri) {
    return new HttpResponseAssert("Get " + uri, doGet(uri, null, null));
  }
this doesn't need to be a rule, since there is no setup and cleanup to do, just a utility
to issue rest call. It's different from GeodeHttpClientRule in that it creates a httpClient
in every rest call, while GeodeHttpClientRule uses one httpClient for the duration of the
entire test.
geode-assembly/geode-assembly-test/src/main/java/org/apache/geode/test/junit/rules/GeodeDevRestClient.java