[SYNCOPE-547] Setting mail.smtp.auth as true when SMTP username is provided

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1624961 13f79535-47bb-0310-9956-ffa450edef68
Core upgrader: some enhancements + support for PostgreSQL

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_2_X@1625012 13f79535-47bb-0310-9956-ffa450edef68
Merge from 1_2_X

git-svn-id: https://svn.apache.org/repos/asf/syncope/trunk@1625013 13f79535-47bb-0310-9956-ffa450edef68