Don't define pytest_bdd_apply_tag when frozen

This should help with the undefined hook while not requiring to install
the pytest-bdd plugin when frozen.

tests/conftest.py

@@ -187,6 +187,7 @@ def pytest_sessionfinish(exitstatus):
         f.write(str(exitstatus))
 
 
+if not getattr(sys, 'frozen', False):
     def pytest_bdd_apply_tag(tag, function):
         version_re = re.compile(r"""
             (?P<package>qt|pyqt)