New Passenger form

[monikakrawczak]

Based on current user role (== passenger) show the new form two fields:

• input field for drive hash (input validation lengh == 6)
• read only field for sign value

[monikakrawczak]

@pniedzwiedzinski

[pniedzwiedzinski]

I have something done but for now I'm waiting for #350 to test if everything works properly