AWS_BUCKETNAME is only needed in order to write on the bucket, but
read-only access should be allowed for other environments.
Fixes bug introduced by 6c3b610610
Curently the name of the bucket is cross checked with the
running environment. In rare case you can have a bucket name
that doesn't match the structure <project>-odoo-<env> in place.
The labs env can be anything starting by 'labs', such as
'labs-logistics', 'labs-finance', ...
* At install, s3/swift is set as default storage
* However, unlike prod/integration, the storage is not forced to be an
object storage
* Redis is required
* When the storage is set on s3/swift, then the bucket name is mandatory
(otherwise, there is no place where to create the files...)
The redis prefix regex match is relaxed: anything starting by a project
name, then '-odoo-', then any combination of letters, digits, and dashes
is accepted (so a prefix my-project9-odoo-labs-web3 is valid).
* When installed, it pulls the addons required for Odoo to run on the
Cloud Platform.
* It provides a method to configure Odoo at the installation.
* It checks if the environment variables are correct according the the
'server environment'
* And add documentation