Change manage-projects default args

Just set them to -v, which we set as an override in the playbook
in the previous change.

Change-Id: Ie18c9bbd7dfa3d274ce283f9152e2c27905d9d08

playbooks/manage-projects.yaml

@@ -25,5 +25,3 @@
       include_role:
         name: gerrit
         tasks_from: manage-projects
-      vars:
-        gerrit_manage_projects_args: "-v"

playbooks/roles/gerrit/defaults/main.yaml

@@ -20,4 +20,4 @@ gerrit_container_volumes:
 gerrit_database_type: MYSQL
 gerrit_project_config_base: /opt/project-config
 gerrit_project_creator_user: openstack-project-creator
-gerrit_manage_projects_args: "-v -l /var/log/manage_projects.log"
+gerrit_manage_projects_args: "-v"