Bug 31124: Make koha-remove stop all workers

This patch makes two things:

* Adds a `get_worker_queues` function to koha-functions.sh
* Makes `koha-remove` loop through all the defined queues to stop all
  the running workers before trying to remove the unix user for the
  instance.

To test:
1. Run:
   $ ktd --shell
  k$ sudo -s
  k$ koha-create --create-db test1
  k$ service koha-common restart
  k$ koha-remove test1
=> FAIL: There's an error about not being able to drop the instance user
2. Run:
  k$ ps -ef | grep test1
=> FAIL: There's a running process for the 'long_tasks' queue worker.
3. Apply this patch
4. Run:
  k$ cp debian/scripts/koha-functions.sh \
        /usr/share/koha/bin/koha-functions.sh
5. Repeat 1 naming the instance `test2`
=> SUCCESS: The instance is removed correctly. No error about running
processes
=> SUCCESS: No process is running for `test2`
6. Sign off :-D

Signed-off-by: Magnus Enger <magnus@libriotech.no>

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 576c496442)
Signed-off-by: Paul Derscheid <paul.derscheid@lmscloud.de>

debian/scripts/koha-functions.sh

@@ -242,6 +242,13 @@ get_worker_name()
     fi
 }
 
+get_worker_queues()
+{
+    for queue in default long_tasks; do
+        echo $queue
+    done;
+}
+
 is_plack_enabled_opac()
 {
     local instancefile=$1

debian/scripts/koha-remove

@@ -81,10 +81,12 @@ eof
     if is_indexer_running $name; then
         koha-indexer --stop $name || /bin/true
     fi
-    # Stop the worker daemon if needed
-    if is_worker_running $name; then
-        koha-worker --stop $name || /bin/true
-    fi
+    # Stop the worker daemons if needed
+    for queue in $(get_worker_queues); do
+        if is_worker_running $name $queue; then
+            koha-worker  --queue $queue --stop $name|| /bin/true
+        fi
+    done
     # Stop the Plack server if needed
     if is_plack_running $name; then
         koha-plack --stop $name || /bin/true