jcommon-1.0.9-bp156.3.8

- Spec file cleanup

- Build with java source and target levels 8

- Update to upstream version 1.0.24:
  * Fix for `RectangleAnchor` class, add handling for gradient
    paint in `PaintUtilities`, fix for bug in `drawRotatedString()`
    method.

- Update to upstrem version 1.0.23
- Remove the test subpackage, since the build target does not
  exist anymore
  * Obsolete: jcommon-test from the jcommon package

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

- Move from jpackage-utils to javapackage-tools

- Inital packaging of the 0.9.6 (from JPP1.7)