* migrate gplus to google oauth2 provider. this still provides support for old gplus connections.

* Update models/oauth2.go

Co-Authored-By: Antoine GIRARD <sapk@users.noreply.github.com>

* make vendor

* update swagger to 0.20.1

* fiw swagger version for validate

* New driver does not tolerate USE - handle this by closing db and reopening db in the new dbname