CSPACE-6372: Compare display names case sensitively when checking if refnames have changed.
CSPACE-6372: Add comment.

Conflicts:
	services/common/src/main/java/org/collectionspace/services/nuxeo/client/java/DocumentModelHandler.java
CSPACE-6372: Change a misnamed variable.
Merge branch 'cspace-deployment_4.0' into bampfa_4.0