EML

If we use the eml parser to validate an eml document with embedded sensorML document, it will complain that the sensorML schema is invalid.

However, xmlSpy and Oxygen don't complain. If we update the xerces to 2.11.0, the complain will go.

I run the junit test against the baseline code, there was a failure. I fixed the problem. Now it succeed.

If the change broke the emlparser, it will be easy to find out.

Now the issue is how deep the change will affect datamanager.

Base on my experience, i think it would NOT be a huge impact. But I will double check with ben.