[IMP] runbot_travis2docker: Move run cmd to helper method (#132)
[IMP] runbot_travis2docker: Move run cmd to helper method (#132)

* [IMP] runbot_travis2docker: Move run cmd to helper method
* Move the docker run command generation to a helper method to allow for better inherited usage

* Clear lint

OCA/runbot-addons,Vauxoo/runbot-addons,OCA/runbot-addons,Vauxoo/runbot-addons