dom2-core-tests-0.0.1-bp152.3.17

- Don't hardcode dependency on java-gcj-compat
  * use java-devel >= 1.6 instead
- Specify java source and target levels 1.6 in order to allow
  building with jdk9

- remove org/w3c/domts/JUnitRunner.java not compatible with junit 4

- Move from jpackage-utils to javapackage-tools

- disable javadoc subpackage
  * drop dom2-core-tests-explicit-javadoc.patch

- license update: W3C
  SPDX

- Remove redundant tags/sections from specfile
  (cf. packaging guidelines)

- Used a gcj instead of java-devel to prevent of an bootstrapping problem with
  openjdk

- Initial packaging ov 0.0.1 (based on Jpackage 1.7)