Add native Zuul v3 bindep-fallback test

Migrate the legacy bindep-fallback tests to native Zuul v3 and add them
here.

Needed-By: I21879df52480cd864b7528221f2b5f667657b7e1
Change-Id: Ie2a7cd3d65d5f6943a2838459dbed2434d7bf26a

.zuul.yaml

@@ -0,0 +1,60 @@
+- job:
+    name: bindep-fallback
+    description: |
+      Check that bindep can install packages from
+      openstack-infra/project-config/jenkins/data/bindep-fallback.txt.
+    roles:
+      - zuul: openstack-infra/zuul-jobs
+    run: playbooks/bindep-fallback/run.yaml
+    vars:
+      zuul_work_dir: "{{ zuul.project.src_dir }}"
+      zuul_work_virtualenv: "{{ ansible_user_dir }}/.venv"
+
+- job:
+    name: bindep-fallback-centos-7
+    parent: bindep-fallback
+    nodeset: centos-7
+
+- job:
+    name: bindep-fallback-fedora-26
+    parent: bindep-fallback
+    nodeset: fedora-26
+
+- job:
+    name: bindep-fallback-debian-jessie
+    parent: bindep-fallback
+    nodeset: debian-jessie
+
+- job:
+    name: bindep-fallback-opensuse-423
+    parent: bindep-fallback
+    nodeset: opensuse-423
+
+- job:
+    name: bindep-fallback-ubuntu-trusty
+    parent: bindep-fallback
+    nodeset: ubuntu-trusty
+
+- job:
+    name: bindep-fallback-ubuntu-xenial
+    parent: bindep-fallback
+    nodeset: ubuntu-xenial
+
+- project:
+    name: openstack-infra/bindep
+    check:
+      jobs:
+        - bindep-fallback-centos-7
+        - bindep-fallback-debian-jessie
+        - bindep-fallback-fedora-26
+        - bindep-fallback-opensuse-423
+        - bindep-fallback-ubuntu-trusty
+        - bindep-fallback-ubuntu-xenial
+    gate:
+      jobs:
+        - bindep-fallback-centos-7
+        - bindep-fallback-debian-jessie
+        - bindep-fallback-fedora-26
+        - bindep-fallback-opensuse-423
+        - bindep-fallback-ubuntu-trusty
+        - bindep-fallback-ubuntu-xenial

playbooks/bindep-fallback/run.yaml

@@ -0,0 +1,20 @@
+- hosts: all
+  pre_tasks:
+    - name: Install requirements
+      pip:
+        chdir: "{{ zuul_work_dir }}"
+        virtualenv: "{{ zuul_work_virtualenv }}"
+        requirements: requirements.txt
+
+    - name: Install the project from source
+      pip:
+        chdir: "{{ zuul_work_dir }}"
+        virtualenv: "{{ zuul_work_virtualenv }}"
+        name: .
+
+  roles:
+    - role: bindep
+      bindep_profile: test
+      bindep_command: "{{ zuul_work_virtualenv }}/bin/bindep"
+      # Define the global file so that no local file gets used.
+      bindep_file: /usr/local/jenkins/common_data/bindep-fallback.txt