Use Tycho for creating the package archives including symbolic links

- Revert the change that used to be required to fix bug 424769 with
  symbolic links in tar archives.
- Update to Tycho to 0.23.0-SNAPSHOT (temporary solution).
- Use maven-antrun-plugin for copying the artifacts.

Bug 455101: Use tycho zipping feature instead of createArchive.sh script
https://bugs.eclipse.org/bugs/show_bug.cgi?id=455101

Signed-off-by: Pascal Rapicault <pascal@rapicorp.com>
Change-Id: I7467f450af212b00a04b002fbe25919b994756e1