[ADD][runbot_language] Add runbot IMP possibility to indicate the language in the instances generated

This module allow set a lang to running the instance build with this one.
NOTE: No make test in other lang, only start running instance in other language.
Hello @max3903,
Yep, copy&paste from original modules:
https://github.com/odoo/odoo/blob/8.0/addons/account/__openerp__.py#L4
No changes in license name yet

When the change is made then we change it with sed command in all *.py files, included this one.