[Debian-med-packaging] Bug#866980: Bug#866980: biomaj-watcher: fails to upgrade from 'jessie': Exception in thread "main" java.lang.UnsupportedClassVersionError: WatcherConfigurator : Unsupported major.minor version 52.0

[Olivier Sallou]

confirmation: biomaj-watcher has been compiled with jdk8

on upgrades, if jdk7 is installed, it will fail to execute/install

in case of upgrade, we switch from jdk7 to jdk8, but install is first
made against jdk7.

jdk must be upgraded first, then biomaj-watcher can be installed.



Solution would be to compile (d/rules) WatcherConfigurator and
UpdateToBiomaj java files with source and target options to 1.5.

No impact on stretch directly as default is jdk 1.8.

A patch could be done on jessie-backports to fix the upgrade issue, but
backports need to be set in apt sources....