Add 2FA Admin Portlet to Control Panel

[michael-wall]

Add a new entry in Control Panel for 2FA Admin portlet to support for following actions:

i. Generate Secret Key and Email QR Code URL to each active user without secret key

ii. Resend QR Code URLs to all active users

• Use this after changing Authenticator Code Length or Duration etc.

iii. Regenerate Secret Key and Email QR Code URL to each active users

Make operation asynchronous, use message listener for mails?
Add methods to service builder service, custom SQL / dynamic queries etc.

[michael-wall]

Remove the totp-2fa-activator module when done.