Prevent adding a bundle prefix when creating a term.
Add behat test.
Revert "Prevent adding a bundle prefix when creating a term."

This reverts commit af29ad7cc3213c5a3da08d1d2ce182b59d71837d.
Fix comments and use hook_taxonomy_term_insert().
Merge pull request #6197 from openscholar/6196

Prevent adding a bundle prefix when creating a term.