nereid_auth_facebook migration to 2.6 #1620

* This patch migrates the module to tryton 2.6

Issue ID: 133003
Merge branch 'release/2.4.0.2' into develop
Merge branch 'feature/task-1620' of github.com:simmianand/nereid-auth-facebook into simmianand-feature/task-1620
Fixed bug in nereid_auth_facebook module #1832

* This patch includes changes user_id to active record to pass it in
  session in user.py

Issue ID: 206001
Merge pull request #10 from simmianand/feature/task-1832

Fixed bug in nereid_auth_facebook module #1832
Bump version to 2.6.0.1
Merge branch 'develop'