SetReadyForReview: Change action label to "Start Review"

In Polygerrit the label is defined in the js as "Start review",
but in GWT the label from the action is used.

Having different labels in the two UIs is potentially confusing
for users. Update the GWT label to be consistent with Polygerrit.

Bug: Issue 7629
Change-Id: I095d8da8359f970e7bb061200b5500a111c5f643
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/SetReadyForReview.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/SetReadyForReview.java
index eb61d3c..3d258c3 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/SetReadyForReview.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/SetReadyForReview.java
@@ -75,7 +75,7 @@
   @Override
   public Description getDescription(ChangeResource rsrc) {
     return new Description()
-        .setLabel("Ready")
+        .setLabel("Start Review")
         .setTitle("Set Ready For Review")
         .setVisible(
             rsrc.isUserOwner()