Move project config in-repo

This directory is only read by the "zuul" tenant in OpenDev Zuul,
so that it can contain the in-repo configuration for this project
without being seen by other users.

This is a copy of what is currently in project-config.  We will add
this, remove the settings from p-c, then begin moving other jobs
in-repo and updating this.

Change-Id: Ie41f2efcaace0ccaf63603a8a0df0de304910ca5

zuul-tests.d/project.yaml

@@ -0,0 +1,52 @@
+- project:
+    templates:
+      - build-tox-docs
+    check:
+      jobs:
+        - openstack-infra-base-integration-centos-7
+        - openstack-infra-base-integration-debian-stable
+        - openstack-infra-base-integration-fedora-latest
+        - openstack-infra-base-integration-ubuntu-bionic
+        - openstack-infra-base-integration-ubuntu-trusty
+        - openstack-infra-base-integration-ubuntu-xenial
+        - openstack-infra-base-integration-opensuse423
+        - openstack-infra-multinode-integration-centos-7
+        - openstack-infra-multinode-integration-debian-stable
+        - openstack-infra-multinode-integration-fedora-latest
+        - openstack-infra-multinode-integration-ubuntu-bionic
+        - openstack-infra-multinode-integration-ubuntu-trusty
+        - openstack-infra-multinode-integration-ubuntu-xenial
+        - openstack-infra-multinode-integration-opensuse423
+        - openstack-zuul-jobs-linters
+        - zuul-jobs-test-install-nodejs
+        - zuul-jobs-test-install-pdk-dependencies
+        - zuul-jobs-test-upload-git-mirror
+        - zuul-jobs-test-registry
+        - tox-py27
+        - tox-py35
+    gate:
+      jobs:
+        - openstack-infra-base-integration-centos-7
+        - openstack-infra-base-integration-debian-stable
+        - openstack-infra-base-integration-fedora-latest
+        - openstack-infra-base-integration-ubuntu-bionic
+        - openstack-infra-base-integration-ubuntu-trusty
+        - openstack-infra-base-integration-ubuntu-xenial
+        - openstack-infra-base-integration-opensuse423
+        - openstack-infra-multinode-integration-centos-7
+        - openstack-infra-multinode-integration-debian-stable
+        - openstack-infra-multinode-integration-fedora-latest
+        - openstack-infra-multinode-integration-ubuntu-bionic
+        - openstack-infra-multinode-integration-ubuntu-trusty
+        - openstack-infra-multinode-integration-ubuntu-xenial
+        - openstack-infra-multinode-integration-opensuse423
+        - openstack-zuul-jobs-linters
+        - zuul-jobs-test-install-nodejs
+        - zuul-jobs-test-install-pdk-dependencies
+        - zuul-jobs-test-upload-git-mirror
+        - zuul-jobs-test-registry
+        - tox-py27
+        - tox-py35
+    post:
+      jobs:
+        - publish-zuul-docs