Set correct list of bundles/fragments in config.ini

Bug 421863 - [releng] Wars created by maven build don't work
https://bugs.eclipse.org/bugs/show_bug.cgi?id=421863

- Do not add start level to servletbridge.extensionbundle fragment 
  in config.ini
- Remove javax.servlet from config.ini

Signed-off-by: Markus Knauer <mknauer@eclipsesource.com>