[EMAIL-154] Add Email#getHeader(String) and Email#getHeaders() methods.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/email/trunk@1692735 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/test/java/org/apache/commons/mail/mocks/MockEmailConcrete.java b/src/test/java/org/apache/commons/mail/mocks/MockEmailConcrete.java
index b1714f6..b03291c 100644
--- a/src/test/java/org/apache/commons/mail/mocks/MockEmailConcrete.java
+++ b/src/test/java/org/apache/commons/mail/mocks/MockEmailConcrete.java
@@ -112,7 +112,8 @@
     /**
      * @return headers
      */
-    public Map<String, String> getHeaders()
+    @Override
+	public Map<String, String> getHeaders()
     {
         return this.headers;
     }