XAMEETINGS-58 : The invitation email is not sent even when the email server is enabled

   * The document name of the user was affected instead of the email of the sender
XAMEETINGS-58 : The invitation email is not sent even when the email
server is enabled

* Formating the XML of the document
XAMEETINGS-58 : The invitation email is not sent even when the email
server is enabled

 * Calculate the email sender of the invitation
Merge pull request #3 from DjeblounSidali/master

XAMEETINGS-58 : The invitation email is not sent even when the email server is enabled
* The document name of the user was affected instead of the email of the sender