add entity type for mainTaxon on article form type
add entity type for mainTaxon on article form type


Former-commit-id: 7d55806f9b6ffe9819a46f3ac26e9ef288a56f4a
Jedisjeux/Jedisjeux,Jedisjeux/Jedisjeux,loic425/Jedisjeux,loic425/Jedisjeux,loic425/Jedisjeux,Jedisjeux/Jedisjeux,loic425/Jedisjeux,loic425/Jedisjeux,Jedisjeux/Jedisjeux