package postint script deletes files belonging to tzdata-java

The .postinst scripts of both openjdk-6-jre-lib and openjdk-7-jre-lib delete files belonging to tzdata-java.

This leads to unexpected errors in Java applications. One such is Eclipse.

Eclipse will fail to list installation history and report the exception:

java.lang.NoClassDefFoundError: Could not initialize class com.ibm.icu.impl.JavaTimeZone

when trying to view Help > About Eclipse Platform > Installation Details > Installation History

The postinst scripts are at fault:

grep -n 'jre/lib/zi' /var/lib/dpkg/info/open*.postinst
/var/lib/dpkg/info/openjdk-6-jre-lib.postinst:8: if [ ! -h /usr/lib/jvm/java-6-openjdk-i386/jre/lib/zi ] && [ -d /usr/lib/jvm/java-6-openjdk-i386/jre/lib/zi ]; then
/var/lib/dpkg/info/openjdk-6-jre-lib.postinst:9: rm -rf /usr/lib/jvm/java-6-openjdk-i386/jre/lib/zi
/var/lib/dpkg/info/openjdk-6-jre-lib.postinst:10: ln -s ../../../../../share/javazi /usr/lib/jvm/java-6-openjdk-i386/jre/lib/zi
/var/lib/dpkg/info/openjdk-7-jre-lib.postinst:8: if [ ! -h /usr/lib/jvm/java-7-openjdk-i386/jre/lib/zi ] && [ -d /usr/lib/jvm/java-7-openjdk-i386/jre/lib/zi ]; then
/var/lib/dpkg/info/openjdk-7-jre-lib.postinst:9: rm -rf /usr/lib/jvm/java-7-openjdk-i386/jre/lib/zi
/var/lib/dpkg/info/openjdk-7-jre-lib.postinst:10: ln -s ../../../../../share/javazi /usr/lib/jvm/java-7-openjdk-i386/jre/lib/zi