Fix issue with volume being created at each docker_dev_start run

NEWS.rst

@@ -7,6 +7,7 @@
 
 Add command to run a redner for a project, from docker_dev_start or directly with docker_redner.
 
+Fix issue with volume being created at each docker_dev_start run.
 
 16.6.0
 ------

odoo_scripts/docker_dev_start.py

@@ -713,7 +713,7 @@
             "/opt/odoo/data",
         ]
     else:
-        extra_volumes = []
+        extra_volumes = ["/var/lib/odoo"]
     for extra_volume in extra_volumes:
         volume_name = "{}_{}".format(project_name, extra_volume.replace("/", "_"))
         DockerClient.create_volume(