Added support of Non-ascii strings in test cases in test_pagure_flask_ui_app.py
    
    Changed name of an user to contain non-ascii characters and also changed the name
    of a pull request to contain Non-ascii Characters and checked whether they were
    rendered correctly.
    It Fixes https://pagure.io/pagure/issue/704.
    
    Merges https://pagure.io/pagure/pull-request/3056