Good bye jenkins/scripts

We now only have afs-slug.sh in jenkins/scripts/ and it is only
used by nodepool/scripts/configure_mirror.sh. Move the file into the
nodepool/scripts directory and adjust paths.

Remove copying of jenkins/scripts from nodepool, the directory does not
exist anymore.

Remove 89-jenkins-scripts, we don't need it anymore.

Depends-On: https://review.openstack.org/548393
Change-Id: I13cac791d70a2e5bcb0de1ba0adcd79e1b0aee9f

nodepool/elements/nodepool-base/post-install.d/89-jenkins-scripts

@@ -1,29 +0,0 @@
-#!/bin/bash
-# Copyright (C) 2011-2013 OpenStack Foundation
-# Copyright 2016 Red Hat, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-#
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
-    set -x
-fi
-set -eu
-set -o pipefail
-
-# NOTE(pabelanger): Until zuulv3 lands, manually copy scripts / data into
-# /usr/local/jenkins.
-mkdir -p /usr/local/jenkins
-cp -a /opt/git/openstack-infra/project-config/jenkins/scripts \
-    /usr/local/jenkins/slave_scripts