Hardcode windmill source directory for job playbooks

This is important when are doing cross project testing, since
zuul.project.src_dir is dynamic to the project running the jobs.

Change-Id: I8684fcaf7412bdfe70727922d2d6f289481bcf36
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

tests/playbooks/group_vars/all.yaml

@@ -0,0 +1,2 @@
+---
+windmill_src_dir: "{{ zuul.projects['git.openstack.org/openstack/windmill'].src_dir }}"

tests/playbooks/post.yaml

@@ -2,7 +2,7 @@
   tasks:
     - name: Run ansible-playbook for collect-logs.yaml
       args:
-        chdir: "{{ zuul.project.src_dir }}"
+        chdir: "{{ windmill_src_dir }}"
       shell: tox -evenv -- ansible-playbook -i inventory/testing/hosts tests/collect-logs.yaml
 
     - name: Ensure ara-report directory exists

tests/playbooks/pre.yaml

@@ -2,17 +2,17 @@
   tasks:
     - name: Bootstrap tox environment
       args:
-        chdir: "{{ zuul.project.src_dir }}"
+        chdir: "{{ windmill_src_dir }}"
       command: tox -evenv --notest
 
     - name: Install bindep dependendies
       args:
-        chdir: "{{ zuul.project.src_dir }}"
+        chdir: "{{ windmill_src_dir }}"
         executable: /bin/bash
       shell: source .tox/venv/bin/activate; ./tools/install_bindep.sh
 
     - name: Install ansible roles via galaxy
       args:
-        chdir: "{{ zuul.project.src_dir }}"
+        chdir: "{{ windmill_src_dir }}"
         executable: /bin/bash
       shell: source .tox/venv/bin/activate; ./tools/install_roles.sh

tests/playbooks/run.yaml

@@ -2,15 +2,15 @@
   tasks:
     - name: Bootstrap bastion node using ansible
       args:
-        chdir: "{{ zuul.project.src_dir }}"
+        chdir: "{{ windmill_src_dir }}"
       shell: tox -evenv -- ansible-playbook -i inventory/testing/hosts playbooks/bastion.yaml
 
     - name: Run ansible-playbook for site.yaml
       args:
-        chdir: "{{ zuul.project.src_dir }}"
+        chdir: "{{ windmill_src_dir }}"
       shell: tox -evenv -- ansible-playbook -i inventory/testing/hosts playbooks/site.yaml --extra-vars "@tests/extra-vars.yaml"
 
     - name: Run ansible-playbook for prove.yaml
       args:
-        chdir: "{{ zuul.project.src_dir }}"
+        chdir: "{{ windmill_src_dir }}"
       shell: tox -evenv -- ansible-playbook -i inventory/testing/hosts playbooks/prove.yaml