[TEST] Ensure that iteration order of TestSection is consistent

src/test/java/org/elasticsearch/test/rest/section/RestTestSuite.java

@@ -35,7 +35,7 @@ public class RestTestSuite {
 
     private SetupSection setupSection;
 
-    private Set<TestSection> testSections = Sets.newHashSet();
+    private Set<TestSection> testSections = Sets.newTreeSet();
 
     public RestTestSuite(String api, String name) {
         this.api = api;

src/test/java/org/elasticsearch/test/rest/section/TestSection.java

@@ -25,7 +25,7 @@ import java.util.List;
 /**
  * Represents a test section, which is composed of a skip section and multiple executable sections.
  */
-public class TestSection {
+public class TestSection implements Comparable<TestSection> {
     private final String name;
     private SkipSection skipSection;
     private final List<ExecutableSection> executableSections;
@@ -71,4 +71,9 @@ public class TestSection {
     public int hashCode() {
         return name != null ? name.hashCode() : 0;
     }
+
+    @Override
+    public int compareTo(TestSection o) {
+        return name.compareTo(o.getName());
+    }
 }