Collective-odoo-pas

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- fix odoo settings forms
- uninstalls cleanly (remove pas plugin and site persistent adapter)
- use RAMCache by default when installing plugin

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- fix missing queryUtility import in odoopas enumerateUsers
- fix search method from oerplib with Odoo 10 (Oerplib shoud be updated!)

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- Removed wrong imports
- Update odoo connection utility on setup changes

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Refactored the whole machinery.
- Now it creats an utility with the Odoo connector configuration and the bas xmlrpc/jsonrpx configuration
- Now it get cookie or login/pwd to credentials.
- Authentication on credentials is made through xmlrpc by maing an authentication on Odoo
- updateCredentials by adding th session cookie of Odoo.
- further requests might be done by rest requests (jsonrpc)

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- Initial release.
[Martronic-SA]