Port to tryton version 2.6
Merge pull request #2 from shalabhaggarwal/develop

Port to tryton version 2.6
Raise Tryton errors instead of pushing to sentry

Raise the errors which are supposed to be meant for
the user instead of sending them to sentry.
Release version 2.6.0.2
Merge branch 'release/2.6.0.2'