set the java_version to 1.8
<property name="build.dir" value="build"/>
<property name="dist.dir" value="dist"/>
- <property name="java_version" value="1.7"/>
+ <property name="java_version" value="1.8"/>
<property name="appengine.app_id" value="openrefine-broker"/>
<property name="appengine.version" value="1"/>
