Replace deprecated bindep-fallback testing

Adopts testing using in-repo bindep.txt testing file instead of
using the deprecated externally hosted bindep-fallback.txt file.

Initial file is the same but in the future we may want to simplify it.

Change-Id: I570fe8686068478a163e4fe597514460b6a69fef

playbooks/bindep/run.yaml

@@ -0,0 +1,31 @@
+- hosts: all
+  vars:
+    bindep_profile: test
+  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: .
+
+    - name: Run bindep with the file
+      command: >
+        {{ zuul_work_virtualenv }}/bin/bindep -b -f
+        "{{ ansible_user_dir }}/{{ zuul.projects['git.openstack.org/openstack-infra/bindep'].src_dir }}/bindep/tests/bindep.txt"
+        {{ bindep_profile }}
+      register: _bindep_output
+      changed_when: false
+      failed_when: false
+
+    - name: Install distro packages from bindep
+      package:
+        name: "{{ _bindep_output.stdout_lines }}"
+        state: present
+      become: yes
+      when: _bindep_output.stdout_lines