fixed assertion - replaced assertEqual with assert

Fixes the following error in the test unit,

``
TESTUNIT FAILED: test_bucket_get_put_deleteTraceback (most recent call last):
  File "eutester/eutestcase.py", line 275, in run
    ret = self.method()
  File "/root/testing/eutester/testcases/cloud_user/s3/bucket_tests.py", line 108, in test_bucket_get_put_delete
    self.assertEqual(e.status, 405, 'Expected response status code to be 405, actual status code is ' + str(e.status))
  File "/usr/local/lib/python2.7/unittest/case.py", line 514, in assertEqual
    assertion_func = self._getAssertEqualityFunc(first, second)
  File "/usr/local/lib/python2.7/unittest/case.py", line 495, in _getAssertEqualityFunc
    asserter = self._type_equality_funcs.get(type(first))
AttributeError: 'BucketTestSuite' object has no attribute '_type_equality_funcs'
``