OpenJDK 8 transition

[Emmanuel Bourg <ebourg@apache.org>]

Hi all,

We are reaching the end of the OpenJDK 8 transition, we are down to one
package failing to build with the new version, and not the least since
it's Eclipse. There is also a handful of patches available for other
packages waiting for their maintainers or a NMU [1].

I think we should now consider switching the default JDK. There is still
some time to migrate Eclipse before the next release.

I suggest that we do the switch the first week of September. OpenJDK 7
will remain available, but ultimately we aim for its removal in Stretch
to lower the maintenance burden.

What do you think?

Emmanuel Bourg

[1]
https://bugs.debian.org/cgi-bin/pkgreport.cgi?tag=openjdk-8-transition;users=debian-java@lists.debian.org