Add job to check projects.yaml alphabetized

It checks that projects.yaml alphabetized and prints list of projects
that should be sorted. Additionally, it adds new job as non-voting to
the openstack-infra/config project.

Change-Id: I9c0eb5072a5b1446ee654296e60c1f8587a3a7ad

modules/jenkins/files/slave_scripts/check_projects_yaml_alphabetized.sh

@@ -0,0 +1,27 @@
+#!/bin/bash -xe
+
+# It checks that projects.yaml alphabetized and prints list of projects that
+# should be sorted.
+
+export TMPDIR=`/bin/mktemp -d`
+trap "rm -rf $TMPDIR" EXIT
+
+pushd $TMPDIR
+
+sed -e '/^- project: /!d' -e 's/^- project: //' \
+    modules/openstack_project/templates/review.projects.yaml.erb \
+    > projects_list
+
+LC_ALL=C sort projects_list -o projects_list.sorted
+
+diff projects_list projects_list.sorted > projects_list.diff
+
+if [[ -n `cat projects_list.diff` ]]; then
+    echo "The following projects should be alphabetized: "
+    cat projects_list.diff | grep -e '> '
+    exit 1
+else
+    echo "Projects alphabetized."
+fi
+
+popd

modules/openstack_project/files/jenkins_job_builder/config/infra.yaml

@@ -58,3 +58,16 @@
     publishers:
       - console-log
       - upload-sphinx-draft
+
+
+- job:
+    name: check-projects-yaml-alphabetized
+    node: bare-precise
+
+    builders:
+      - gerrit-git-prep
+      - shell: |
+          /usr/local/jenkins/slave_scripts/check_projects_yaml_alphabetized.sh
+
+    publishers:
+      - console-log

modules/openstack_project/files/zuul/layout.yaml

@@ -338,6 +338,8 @@ jobs:
     voting: false
   - name: gate-climate-devstack-dsvm
     voting: false
+  - name: check-projects-yaml-alphabetized
+    voting: false
 # puppet-openstack targets
   - name: gate-puppet-vswitch-puppet-lint
     voting: false
@@ -546,11 +548,13 @@ projects:
       - gate-config-puppet-lint
       - gate-config-puppet-syntax
       - gate-ci-docs
+      - check-projects-yaml-alphabetized
     gate:
       - gate-config-layout
       - gate-config-pep8
       - gate-config-puppet-lint
       - gate-config-puppet-syntax
+      - check-projects-yaml-alphabetized
     post:
       - ci-docs