Fix constructor

Author: shishkovilja

modules/core/src/main/java/org/apache/ignite/internal/processors/authentication/InitialUsersData.java

@@ -36,6 +36,9 @@ public class InitialUsersData implements Message {
     @Order(1)
     ArrayList<UserManagementOperation> activeOps;
 
+    /** */
+    public InitialUsersData() { }
+
     /**
      * @param usrs Users.
      * @param ops  Active operations on cluster.