bpo-45182: Fix incorrect use of requires_zlib in test_bdist_rpm (GH-28305)

It is a decorator factory and should be always followed by "()".

Author: serhiy-storchaka

Lib/distutils/tests/test_bdist_rpm.py

@@ -44,7 +44,7 @@ def tearDown(self):
     # spurious sdtout/stderr output under Mac OS X
     @unittest.skipUnless(sys.platform.startswith('linux'),
                          'spurious sdtout/stderr output under Mac OS X')
-    @requires_zlib
+    @requires_zlib()
     @unittest.skipIf(find_executable('rpm') is None,
                      'the rpm command is not found')
     @unittest.skipIf(find_executable('rpmbuild') is None,
@@ -87,7 +87,7 @@ def test_quiet(self):
     # spurious sdtout/stderr output under Mac OS X
     @unittest.skipUnless(sys.platform.startswith('linux'),
                          'spurious sdtout/stderr output under Mac OS X')
-    @requires_zlib
+    @requires_zlib()
     # http://bugs.python.org/issue1533164
     @unittest.skipIf(find_executable('rpm') is None,
                      'the rpm command is not found')