upgrade eclipselink to v. 2.7.4

Author: rrsln

pom.xml

@@ -439,12 +439,12 @@
 <dependency>
 <groupId>org.eclipse.persistence</groupId>
 <artifactId>org.eclipse.persistence.jpa</artifactId>
-<version>2.5.1</version>
+<version>2.7.4</version>
 </dependency>
 <dependency>
 <groupId>org.eclipse.persistence</groupId>
 <artifactId>javax.persistence</artifactId>
-<version>2.1.1</version>
+<version>2.2.1</version>
 </dependency>
 <dependency>
 <groupId>com.zaxxer</groupId>
@@ -595,7 +595,7 @@
 <dependency>
 <groupId>org.eclipse.persistence</groupId>
 <artifactId>org.eclipse.persistence.core</artifactId>
-<version>2.5.1</version>
+<version>2.7.4</version>
 </dependency>
 <dependency>
 <groupId>org.apache.commons</groupId>