Add password authentification on external smtp servers (#240)

* Add SMTP Authentification

* refactor: restrict access to getEmailSession()

* fix: FreemarkerEmailFactory test, defined protocols if TLS port is used to send email

* fix: add check for TLSv1.3 support

home/src/main/resources/config/example.runtime.properties

@@ -40,6 +40,9 @@ vitro.local.solr.url = http://localhost:8983/solr/vitrocore
   #   Example:
   #     email.smtpHost = smtp.mydomain.edu
   #     email.replyTo = vitroAdmin@mydomain.edu
+  #     email.username = vivtroAdmin@mydomain.edu
+  #     email.password = secret
+  #     email.port = 25 or 465 or 587
   #
 email.smtpHost =
 email.replyTo =