Add wordpress root access flag

When a cloud image only has root user, deploy wordpress will fail
without the flag since wordpress by default does not allow root user
to deploy artifacts. Adding this flag will allow root and non root
users to be used to deploy wordpress

Change-Id: Icf0a62bdfc5db5d0e14752908477288516143eb9

workloads/ansible/shade/lampstack/roles/wordpress/tasks/ubuntu.yml

@@ -18,6 +18,7 @@
     --admin_user=wpuser
     --admin_password="{{ db_pass }}"
     --admin_email='interop@openstack.org'
+    --allow-root
   when: hostvars.cloud.balancer.openstack.public_v4 != ""
 
 - name: Install wordpress
@@ -28,11 +29,12 @@
     --admin_user=wpuser
     --admin_password="{{ db_pass }}"
     --admin_email='interop@openstack.org'
+    --allow-root
   when: hostvars.cloud.balancer.openstack.public_v4 == ""
 
 - name: Install package for automated plugin activation
   shell: >
-    wp package install itspriddle/wp-cli-tgmpa-plugin
+    wp package install itspriddle/wp-cli-tgmpa-plugin --allow-root
 
 - name: Make an initial request, so that later switch-theme hooks work.
   shell: >
@@ -41,7 +43,7 @@
 
 - name: Activate wordpress theme
   command: >
-    wp --path=/var/www/html theme activate superuser
+    wp --path=/var/www/html theme activate superuser --allow-root
 
 - name: Install and activate required plugins
   shell: >
@@ -81,7 +83,7 @@
 
 - name: Import wordpress posts
   command: >
-    wp --path=/var/www/html import /tmp/posts/superuser_content.xml --authors=create --quiet
+    wp --path=/var/www/html import /tmp/posts/superuser_content.xml --authors=create --quiet --allow-root
 
 - name: Regenerate thumbnails for the imported posts
   shell: >