Fix default Java version

The default Java binary was not updated.


bash-4.1# java -version
java version "1.5.0"
gij (GNU libgcj) version 4.4.7 20120313 (Red Hat 4.4.7-16)

bash-4.1# $JAVA_HOME/bin/java -version
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)

Dockerfile

@@ -28,6 +28,7 @@ RUN rm jdk-7u71-linux-x64.rpm
 
 ENV JAVA_HOME /usr/java/default
 ENV PATH $PATH:$JAVA_HOME/bin
+RUN rm /usr/bin/java && ln -s $JAVA_HOME/bin/java /usr/bin/java
 
 # download native support
 RUN mkdir -p /tmp/native