Bug#925431: postinst not ready for OpenJDK >= 12

[Matthias Klose]

Control: reassign -1 ca-certificates-java
Control: found -1 20190214
Control: tags -1 + sid buster

the postinst is not ready for OpenJDK >= 12. Please extend the loop for java
versions 12 - 17 (inclusive, the next OpenJDK LTS version).