library/roles/smartgears/resource_registry: Add a variable to manage the resource registry upgrade.

smartgears/resource_registry/defaults/main.yml

@@ -1,5 +1,6 @@
 ---
 resource_registry_install: False
+resource_registry_upgrade: False
 resource_registry_gcube_repository: gcube-snapshots
 resource_registry_snapshot_ver: 1.1.0-SNAPSHOT
 resource_registry_version: 1.1.0-20160929.151332-7

smartgears/resource_registry/tasks/main.yml

@@ -3,11 +3,11 @@
 
     - name: Remove the old smart executor files if present
       file: path={{ smartgears_instance_path }}/webapps/{{ smart_executor_name }} state=absent
-      when: ( not smart_executor_install ) or ( smartgears_upgrade )
+      when: resource_registry_upgrade
 
     - name: Remove the old resource-registry files
       file: path={{ smartgears_instance_path }}/webapps/{{ resource_registry_name }} state=absent
-      when: ( not resource_registry_install ) or ( smartgears_upgrade )
+      when: resource_registry_upgrade
 
     # NOTE: Install as the smartgears user so we do not mess with the permissions
     - name: Get the resource-registry-service