Bug#894290: gradle should raise the source/target level to the minimum supported by the default JDK

[殷啟聰 | Kai-Chung Yan]

Control: reassign -1 gradle-debian-helper 1.6

I would say this is not the fault of Gradle itself, but it the tricks can be provided by `gradle-debian-helper`. We shouldn't modify the behavior of the build tools too much.

Let's keep the severity as is for now, as FTBFS is quite serious indeed.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <http://alioth-lists.debian.net/pipermail/pkg-java-maintainers/attachments/20180513/1d7695ad/attachment.sig>