Eperez autofill displayname 172

PR for the EDUID-172 issue (Generate displayname automatically).
Note that originally this was done server side, and the test was testing that, upon submitting a personal data form with no displayName, it would be generated server side. Since now we are generating the displayName client side, with javascript, and the test browser does not execute javascript, the test was failing, so I have left it as a simple general test for the personal data form, and as a template for any other test of the form that may be needed in the future.