Adds Chef style checking job

Adds a macro that fires off tailor to check cookbooks
Chef and Ruby style.

See https://review.openstack.org/#/c/30827 for some
more information about the use of tailor against the
Chef cookbook repositories.

Marks the OpenStack Compute cookbook for gating with
this new job.

Change-Id: Ib5b3d6548749ddc1107a70b462f7432dde672410
Reviewed-on: https://review.openstack.org/30921
Reviewed-by: John Dewey <john@dewey.ws>
Reviewed-by: craigtracey <craigtracey@gmail.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Approved: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins

modules/openstack_project/files/jenkins_job_builder/config/chef-jobs.yaml

@@ -27,3 +27,18 @@
 
     publishers:
       - console-log
+
+- job-template:
+    name: 'gate-{name}-chef-style'
+    node: '{node}'
+
+    triggers:
+      - zuul
+
+    builders:
+      - gerrit-git-prep
+      - chef-cookbook-prep
+      - chef-cookbook-style
+
+    publishers:
+      - console-log

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

@@ -89,6 +89,13 @@
               exit 1
           fi
 
+- builder:
+    name: chef-cookbook-style
+    builders:
+      - shell: |
+          COOKBOOK=$(awk '/^name/ {print $NF}' metadata.rb |tr -d \"\')
+          ruby1.9.1 /usr/bin/bundle exec tailor
+
 - builder:
     name: chef-cookbook-lint
     builders:

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

@@ -964,6 +964,7 @@
 
     jobs:
       - gate-{name}-chef-lint
+      - gate-{name}-chef-style
       - gate-{name}-chef-unit
 
 - project:

modules/openstack_project/files/zuul/layout.yaml

@@ -1852,9 +1852,11 @@ projects:
   - name: stackforge/cookbook-openstack-compute
     check:
       - gate-cookbook-openstack-compute-chef-lint
+      - gate-cookbook-openstack-compute-chef-style
       - gate-cookbook-openstack-compute-chef-unit
     gate:
       - gate-cookbook-openstack-compute-chef-lint
+      - gate-cookbook-openstack-compute-chef-style
       - gate-cookbook-openstack-compute-chef-unit
 
   - name: stackforge/cookbook-openstack-dashboard