(split) Bug#234 jambi requires qt-sql to be installed
(split) Bug#234 jambi requires qt-sql to be installed

This moves the optional examples/demos into new java packages.
We also fixup the ${javac.excludes} to be used for the main build
(as well as examples/demos).

Also QT_NO_HELP and QT_NO_TEST and QT_NO_SCRIPT added blindly.

qt-generator/qt-generator,qt-generator/qt-generator,qt-generator/qt-generator