change standard to jdk 8 with java 1.7 file compliance

Author: wumpz

nb-configuration.xml

@@ -19,5 +19,6 @@
         <com-junichi11-netbeans-changelf.lf-kind>LF</com-junichi11-netbeans-changelf.lf-kind>
         <com-junichi11-netbeans-changelf.use-global>false</com-junichi11-netbeans-changelf.use-global>
         <org-netbeans-modules-javascript2-requirejs.enabled>true</org-netbeans-modules-javascript2-requirejs.enabled>
+        <netbeans.hint.jdkPlatform>JDK_1.8</netbeans.hint.jdkPlatform>
     </properties>
 </project-shared-configuration>