Default email two factor authentication

Email file

2FAEmailTemplate_en_US.mustache

<p>Hi {{username}},</p>
<p>You can use the following verification code to complete the authentication process:</p>
<p><strong>{{code}}</strong></p>
<p>The code will be valid until: {{expiration}}</p>
<p>If you did not request the verification code, please ignore this email.</p>
<p>Thank you,</p>
<p>The Abiquo Team</p>

Properties file
2faEmail_en_US.properties
```
subject=Abiquo two factor authentication code
```
If you change the subject property, you must restart the Tomcat server to apply your changes
You cannot set the username, code, or expiration. If you set these values, the platform will overwrite them