initial implementation of createDataRepositoriesList
reposition data reference attachment service under /artifact
Add attach data ref link to objectDetails.html.ftl
move utility methods out to RestletUtils and rename data reference
resource
javadoc RestletUtils.getParentDetails
remove nested duplicated if
refactor populateParentDetails
refactor populateParentDetails again

including removing the warning about not having a relationship, as it is
very likely to be misleading if it occurs on a new objects page
remove unused parameter
minor refactoring for readability
modifications to templates for data reference attach page