Check if env.d folder exists for upgrades

If an env.d folder does not exist then no actions
should be done relating to the contents of the
folder.

Change-Id: I3ea94aa2882cba6dd8cc9550bac68fedcc4658b7

scripts/upgrade-utilities/playbooks/deploy-config-changes.yml

@@ -22,26 +22,35 @@
       - name: Create an old copy of openstack_deploy
         copy:
           src: "/etc/openstack_deploy/"
-          dest: "/etc/openstack_deploy.NEWTON/"
+          dest: "/etc/openstack_deploy.OCATA/"
           force: no
 
-      - name: Retrieve differences
-        shell: rsync -avun "{{ repo_root_dir }}/playbooks/inventory/env.d/" "/etc/openstack_deploy/env.d/" | grep "yml$"
-        failed_when: false
-        register: diff_result
+      - name: Check if there is a user-space env.d directory
+        stat:
+          path: "/etc/openstack_deploy/env.d"
+        register: _envd_dir
 
-      - name: Copy new env.d files into place
-        copy:
-            src: "{{ repo_root_dir }}/playbooks/inventory/env.d/{{ item }}"
-            dest: "/etc/openstack_deploy/env.d/{{ item }}"
-            force: no
-        with_items:
-            - "{{ diff_result.stdout_lines }}"
-        when: diff_result.stdout != ""
+      - block:
 
-      - name: Check result for emptiness
-        debug: msg="All new env.d files are placed in the stock repo. No new changes"
-        when: diff_result.stdout == ""
+        - name: Retrieve differences
+          shell: rsync -avun "{{ repo_root_dir }}/playbooks/inventory/env.d/" "/etc/openstack_deploy/env.d/" | grep "yml$"
+          failed_when: false
+          register: diff_result
+
+        - name: Copy new env.d files into place
+          copy:
+              src: "{{ repo_root_dir }}/playbooks/inventory/env.d/{{ item }}"
+              dest: "/etc/openstack_deploy/env.d/{{ item }}"
+              force: no
+          with_items:
+              - "{{ diff_result.stdout_lines }}"
+          when: diff_result.stdout != ""
+
+        - name: Check result for emptiness
+          debug: msg="All new env.d files are placed in the stock repo. No new changes"
+          when: diff_result.stdout == ""
+
+        when: _envd_dir.stat.exists | bool
 
       - name: Update OpenStack variable names
         command: "{{ upgrade_scripts }}/migrate_openstack_vars.py {{ item }} {{ (item | basename)[:-4] }}"
@@ -50,7 +59,7 @@
         with_fileglob:
           - "/etc/openstack_deploy/user_*.yml"
 
-      - name: Write vars required for upgrade from Mitaka
+      - name: Write vars required for upgrade
         lineinfile:
           dest: /etc/openstack_deploy/user_variables.yml
           regexp: "^{{ item.key }}"