Add 5.5.2 Version and 5.5.1 BWC indices

core/src/main/java/org/elasticsearch/Version.java

@@ -86,6 +86,8 @@ public class Version implements Comparable<Version> {
     public static final Version V_5_5_0 = new Version(V_5_5_0_ID, org.apache.lucene.util.Version.LUCENE_6_6_0);
     public static final int V_5_5_1_ID = 5050199;
     public static final Version V_5_5_1 = new Version(V_5_5_1_ID, org.apache.lucene.util.Version.LUCENE_6_6_0);
+    public static final int V_5_5_2_ID = 5050299;
+    public static final Version V_5_5_2 = new Version(V_5_5_2_ID, org.apache.lucene.util.Version.LUCENE_6_6_0);
     public static final int V_5_6_0_ID = 5060099;
     public static final Version V_5_6_0 = new Version(V_5_6_0_ID, org.apache.lucene.util.Version.LUCENE_6_6_0);
     public static final int V_6_0_0_alpha1_ID = 6000001;
@@ -120,6 +122,8 @@ public class Version implements Comparable<Version> {
                 return V_6_0_0_alpha1;
             case V_5_6_0_ID:
                 return V_5_6_0;
+            case V_5_5_2_ID:
+                return V_5_5_2;
             case V_5_5_1_ID:
                 return V_5_5_1;
             case V_5_5_0_ID: