API filter PR by status

Before the fix: (pagure/api/fork.py, line 167: if status_text in ["0", "false", "closed"]:

Traceback (most recent call last):
  File "/home/vagrant/.virtualenvs/python3-pagure/lib/python3.6/site-packages/mock/mock.py", line 1305, in patched
    return func(*args, **keywargs)
  File "/home/vagrant/devel/tests/test_pagure_flask_api_user.py", line 868, in test_api_view_user_requests_filed
    self.assertEqual(len(data_nouser['requests']), 2)
AssertionError: 4 != 2


After the fix: (pagure/api/fork.py, line 167: if status_text in ["0", "false"]:

Test suite passed: py-test_pagure_flask_api_user
Running 0 suites: 0 remaining, 0 failed
All work done


ALL PASSED! CONGRATULATIONS!