integrate eclipselink 2.7.4 (#27)

Signed-off-by: Lukas Jungmann <lukas.jungmann@oracle.com>

jaxws-ri/boms/bom-ext/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2012, 2018 Oracle and/or its affiliates. All rights reserved.
+    Copyright (c) 2012, 2019 Oracle and/or its affiliates. All rights reserved.
 
     This program and the accompanying materials are made available under the
     terms of the Eclipse Distribution License v. 1.0, which is available at
@@ -34,7 +34,7 @@
         <ant.version>1.10.5</ant.version>
         <asm.version>3.1</asm.version>
         <commonj.sdo.version>2.1.1</commonj.sdo.version>
-        <eclipselink.version>2.7.3</eclipselink.version>
+        <eclipselink.version>2.7.4</eclipselink.version>
         <javax.persistance.version>2.2.2</javax.persistance.version>
         <junit.version>4.12</junit.version>
         <mail.version>1.6.3</mail.version>