jisp2-2.5.1-bp160.1.9

- Added patch:
  * jisp2-2.5.1-reproducible-jar-mtime.patch
    + Use SOURCE_DATE_EPOCH for jar modification times
- Modified patch:
  * jisp2-2.5.1-javac-flags.patch
    + build javadoc with the -notimestamp option

- Use %patch -P N instead of deprecated %patchN.

- Build with java source/target levels 8

- Specify java source and target level 1.6 in order to allow
  building with jdk9

- Update once more the alternatives to be up to docu.

- Cleanup and fix update-alternatives code.

- Move from jpackage-utils to javapackage-tools

- license update: Libpng
  License heavily  based on libpng license which in SPDX syntax is Libpng

- 'Initial SUSE packaging'