Add Email validation #527
Description
Excel Notes: lr.shibboleth.name.acceptation.allowedEmailTemplate: This property is not used in Clarin-dspace. The method where this property is supposed to be used is not used at all. Instead, the method HibernateFunctionalityManager.getEmailAcceptedOrNull(email) is used. However, there is a TODO to create an email validation following the HibernateFunctionalityManager.getEmailAcceptedOrNull(email) method. This validation should be added everywhere emails are sent.
PR: #644