Fixes #5734 - API for external groups management
Fixes #6891: Taxonomies couldn't be seeded after initial run of seeds.

On a clean run of seeds, a seed prior to the taxonomies sets User.current.
On subsequent runs, errors are thrown since User.current is not thrown
and taxonomy creation expects this.
Fixes #6953 - Fixing N_() calls in the User model
Fixes #6962 - Use as_admin instead of find_by_login for usergroup tests
Fixes #6969: Add wildcards to the end of the log files to collect the rotated files
i18n - extracting new, updating rails, pulling from tx