Fixes test failure on centos machines

Fixes broken test on CentOS machines
```
======================================================================
FAIL: test_get_dataset_to_xml (test_registration_process.RegistrationProcessTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot-runner/cloud_1/coi_nightly/build/ion/processes/data/registration/test/test_registration_process.py", line 54, in test_get_dataset_to_xml
    self.assertEquals('product_name', n.childNodes[0].nodeValue)
AssertionError: 'product_name' != u'\n\t\t\tproduct_name\n\t\t'
```