[MPLUGIN-337] Try to derive JDK requirements also from release parameter

Signed-off-by: olivier lamy <olamy@apache.org>
diff --git a/maven-plugin-plugin/src/main/java/org/apache/maven/plugin/plugin/PluginReport.java b/maven-plugin-plugin/src/main/java/org/apache/maven/plugin/plugin/PluginReport.java
index d432333..f005ce4 100644
--- a/maven-plugin-plugin/src/main/java/org/apache/maven/plugin/plugin/PluginReport.java
+++ b/maven-plugin-plugin/src/main/java/org/apache/maven/plugin/plugin/PluginReport.java
@@ -772,6 +772,12 @@
                 return jdk;
             }
 
+            jdk = getPluginParameter( compiler, "release" );
+            if ( jdk != null )
+            {
+                return jdk;
+            }
+
             // default value
             jdk = project.getProperties().getProperty( "maven.compiler.target" );
             if ( jdk != null )