Add large scale down flag to client

Author: pschoenfelder

SingularityClient/src/main/java/com/hubspot/singularity/client/SingularityClient.java

@@ -698,6 +698,15 @@ private HttpResponse put(
     return executeRequest(hostToUri, type, body, Method.PUT, Optional.empty());
   }
 
+  private HttpResponse put(
+    Function<String, String> hostToUri,
+    String type,
+    Optional<?> body,
+    Map<String, Object> queryParams
+  ) {
+    return executeRequest(hostToUri, type, body, Method.PUT, Optional.of(queryParams));
+  }
+
   private <T> Optional<T> post(
     Function<String, String> hostToUri,
     String type,
@@ -1038,13 +1047,25 @@ public void unpauseSingularityRequest(
   public void scaleSingularityRequest(
     String requestId,
     SingularityScaleRequest scaleRequest
+  ) {
+    scaleSingularityRequest(requestId, scaleRequest, Optional.empty());
+  }
+
+  public void scaleSingularityRequest(
+    String requestId,
+    SingularityScaleRequest scaleRequest,
+    Optional<Boolean> largeScaleDownAcknowledged
   ) {
     final Function<String, String> requestUri = host ->
       String.format(REQUEST_SCALE_FORMAT, getApiBase(host), requestId);
     put(
       requestUri,
       String.format("Scale of Request %s", requestId),
-      Optional.of(scaleRequest)
+      Optional.of(scaleRequest),
+      Collections.singletonMap(
+        "largeScaleDownAcknowledged",
+        largeScaleDownAcknowledged.orElse(false)
+      )
     );
   }