Bug 22238: Remove koha-*-sip scripts in favor of koha-sip

Bug 22238: Remove koha-*-sip scripts in favor of koha-sip

This patch removes traces from the (deprecated) koha-*-sip scripts.

To test:
- Apply the patch
- Verify no traces of koha-*-sip remain on the codebase (besides
  Release Notes, koha-common.links and the koha-sip script):
  $ cd kohaclone
  $ git grep koha-start-sip
  $ git grep koha-stop-sip
  $ git grep koha-enable-sip
=> SUCCESS: No traces!
- Create the following symlinks:
  $ sudo ln -s /usr/sbin/koha-sip  /usr/sbin/koha-start-sip
  $ sudo ln -s /usr/sbin/koha-sip  /usr/sbin/koha-stop-sip
  $ sudo ln -s /usr/sbin/koha-sip  /usr/sbin/koha-enable-sip
- Try the koha-*-zebra commands:
  $ sudo koha-stop-sip kohadev
  $ sudo koha-start-sip kohadev
  $ sudo koha-restart-sip kohadev
=> SUCCESS: They all work as expected!

- Sign off :-D!

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>