Rework api-site publishing

Publishing is now only done on developer.openstack.org and not anymore
on docs.openstack.org:
* Remove api-site-tox-doc-publishdocs
* Create new job openstack-api-ref-publish-lang to publish translated
  documents to developer.o.o.
* Remove api-site-tox-doc-publishlang job (published translated
  documents to docs.o.o). For this, we need to replace the
  openstack-doc-translation template with individual jobs.

Change-Id: Id9d9c378c29e5601fe994b46ede19ddae61cfb53

jenkins/jobs/api-jobs.yaml

@@ -38,6 +38,24 @@
           target: '/'
           remove-prefix: 'publish-docs/api-ref/'
 
+- job:
+    name: openstack-api-ref-publish-lang
+    node: 'bare-precise || bare-trusty'
+
+    builders:
+      - revoke-sudo
+      - gerrit-git-prep
+      - tox:
+          envlist: 'publishlang-api'
+
+    publishers:
+      - console-log
+      - upload-doc-build-results
+      - ftp:
+          site: developer.openstack.org
+          source: 'publish-docs/api-ref/**'
+          target: '/'
+          remove-prefix: 'publish-docs/api-ref/'
 
 # in zuul/layout.yaml specified to only run against master branch.
 # this copies static files from www

zuul/layout.yaml

@@ -5667,10 +5667,18 @@ projects:
       - name: merge-check
       - name: openstack-doc-gate
       - name: openstack-doc-translation
+    check:
+      - gate-api-site-tox-checklang
+    gate:
+      - gate-api-site-tox-checklang
+    post:
+      - api-site-upstream-translation-update
     post:
-      - api-site-tox-doc-publishdocs
       - openstack-api-site
       - openstack-api-ref
+      - openstack-api-ref-publish-lang
+    periodic:
+      - api-site-propose-translation-update
 
   - name: openstack/docs-specs
     template: