Implememts equals/hashCode in FileInfo

Change-Id: I119c5817efb385c98e72c74835f0f33a1921f55b
diff --git a/java/com/google/gerrit/extensions/common/FileInfo.java b/java/com/google/gerrit/extensions/common/FileInfo.java
index 747f9e2..32c5bd5 100644
--- a/java/com/google/gerrit/extensions/common/FileInfo.java
+++ b/java/com/google/gerrit/extensions/common/FileInfo.java
@@ -25,6 +25,7 @@
   public long sizeDelta;
   public long size;
 
+  @Override
   public boolean equals(Object o) {
     if (o instanceof FileInfo) {
       FileInfo fileInfo = (FileInfo) o;
@@ -38,4 +39,9 @@
     }
     return false;
   }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(status, binary, oldPath, linesInserted, linesDeleted, sizeDelta, size);
+  }
 }