Major Description
PROBLEM STATEMENT:
Ranger currently sets the Last Name and First Name fields from the User Name field.
However, only space, _ and - is accepted in the Last Name field when trying to make a sync'd user an Admin. Usernames could be in the form firstname.lastname meaning they cannot change any users to Admins in the Ranger Admin interface. It fails with the message
"Last name should start with alphabets & can have underscore, hyphen, space."
PROPOSED SOLUTION:
Please allow . [dot] in First Name and Last name of User (update validation on UI).