Fix main build by using release configuration for maven-compiler-plugin

Signed-off-by: Aurélien Pupier <apupier@redhat.com>

pom.xml

@@ -259,8 +259,7 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>${maven-compiler-plugin-version}</version>
                 <configuration>
-                    <source>${jdk.version}</source>
-                    <target>${jdk.version}</target>
+                	<release>${jdk.version}</release>
                     <maxmem>512M</maxmem>
                     <fork>${compiler.fork}</fork>
                 </configuration>