Replace "requires" class decorator with a simple if (for Python 2.5 compatibility)

Reviewed-by: Lauro Moura <lauro.neto@openbossa.org>
Reviewed-by: Bruno Araujo <bruno.araujo@openbossa.org>

tests/util/helper/decorators.py

@@ -1,43 +0,0 @@
-
-'''Decorators for skipping test methods and test cases'''
-
-import logging
-import unittest
-
-
-class requires(object):
-    '''Skip if the given module is not found
-    
-    Usage:
-
-    @requires('RequiredModule')
-    class MyTestCase(unittest.TestCase):
-        ...
-    '''
-
-    def __init__(self, *args):
-        '''Setup this decorator. Args should be a list of
-        module names'''
-        self.skip = False
-
-        for module in args:
-            try:
-                __import__(module)
-            except ImportError:
-                self.skip = True
-                self.skipped = module
-                break
-
-    def __call__(self, klass):
-        '''Replace a skipped class with a dummy testCase'''
-        if not self.skip:
-            return klass
-
-        logging.warning('Module %s not found. Skipping %s' % (self.skipped,
-                                                            klass.__name__))
-
-        class SkipWrapper(unittest.TestCase):
-            '''Dummy wrapper'''
-            pass
-
-        return SkipWrapper