Refactor methods into XMLTools and remove API changes
Disable OMERO Ann to test removal of NS

setValue() on the Modulo object was causing bfconvert
to fail due to XML parsing. This has now been disabled.
At the same time the NS elements from asXMLElement()
have been removed creating the desired block of XML:

```
    <XMLAnnotation ID="Annotation:90" Namespace="openmicroscopy.org/omero/dimension/modulo">
      <Value>
        <ModuloAlongT End="12304.687643793777" Start="0.0" Step="195.3125022824409" Type="lifetime" TypeDescription="TCSPC" Unit="ps"/>
      </Value>
    </XMLAnnotation>
```