relaxed username validation to fix #539
relaxed username validation to fix #539

PROCERGS/login-cidadao,culturagovbr/id-cultura,PROCERGS/login-cidadao,PROCERGS/login-cidadao,PROCERGS/login-cidadao,culturagovbr/id-cultura,culturagovbr/id-cultura,culturagovbr/id-cultura