update to java 1.7

Change-Id: Iad0f355ad804c583311a8c8bbb65afd1b7c408e1
diff --git a/org.eclipse.scout.maven.plugins.updatesite/pom.xml b/org.eclipse.scout.maven.plugins.updatesite/pom.xml
index 04a24a2..4c11e6c 100644
--- a/org.eclipse.scout.maven.plugins.updatesite/pom.xml
+++ b/org.eclipse.scout.maven.plugins.updatesite/pom.xml
@@ -126,8 +126,8 @@
             <artifactId>maven-compiler-plugin</artifactId>
             <version>2.3.2</version>
             <configuration>
-              <source>1.6</source>
-              <target>1.6</target>
+              <source>1.7</source>
+              <target>1.7</target>
             </configuration>
           </plugin>
         </plugins>