run shell linters

Rely on the metaproject clone URL instead of its directory name. Works fine
with the bitbucket.org ➔ orus.io move.

TG-70

 use python lint template

Instead only use it when installing, updating, or testing

Default using project name from CI/DRONE, and default to directory project name as a last resort.
 fix that last point as it was using project_name_from_home instead of the variable of the same name

project uses isoparse that was added in 2.7.0

 import_jsonrpc: enforce ISO format on date and datetime to avoid potential errors with unwanted format due to DB configuration

Also set correct permission for sessions mount

no path in that case