Adding functionality that will allow the user to remove external identifiers
Reading metadata in the ui
Add the option to remove external identifiers. Hibernate is not persisting the changes yet
Modifying the orcid message object, adding the orcid property for the external identifiers
Setting orphan removal to allow deleted external identifiers to be deleted from database
Changed so that external ORCID of added external identifier is only
overwritten (with the ORCID of the current API user) if it is not
supplied in the request.
Checking if the external orcid provided in the request is associated with an existing user.
Fixing code conflicts
Merge pull request #105 from ORCID/dev-removeExternalIdentifiers

Dev remove external identifiers