[SYNCOPE-487] minor fix email templates: use email address instead of username in generated link, as indicated in the text

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1582226 13f79535-47bb-0310-9956-ffa450edef68
[SYNCOPE-487] Merge from 1_1_X

git-svn-id: https://svn.apache.org/repos/asf/syncope/trunk@1582232 13f79535-47bb-0310-9956-ffa450edef68