LP#1187029 Remove unused open-ils.ingest service

Remove open-ils.ingest service and related scripts and code.

In addition to removing OpenILS::Application::Ingest, this commit
removes code that was commented out at the time of open-ils.ingest's
replacement with in-db ingest, example configuration elements, a
use_ok test, and the following obsolete scripts which made use of or
were otherwise related to open-ils.ingest:

* Open-ILS/src/extras/import/direct_ingest.pl
* Open-ILS/src/extras/import/generate-srfsh-indexer.pl
* Open-ILS/src/extras/import/importer.sh

The included release notes recommend removal of the open-ils.ingest service
from configuration files when upgrading, and suggest removal of Ingest.pm from
its location in @INC.

Signed-off-by: Jeff Godin <jgodin@tadl.org>
Signed-off-by: Bill Erickson <berick@esilibrary.com>
LP#1187029 release notes typo repair for ingest cleanup

Signed-off-by: Bill Erickson <berick@esilibrary.com>