Update eclipse compiler org.eclipse.jdt:ecj to 3.15.0

Change-Id: Iabca86db71e166e6ce73db2f8ddc5058e58da11a
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

pom.xml

@@ -838,7 +838,7 @@
               <dependency>
                 <groupId>org.eclipse.jdt</groupId>
                 <artifactId>ecj</artifactId>
-                <version>3.13.102</version>
+                <version>3.15.0</version>
               </dependency>
             </dependencies>
           </plugin>