GitLab

Refs: #2416

Refs: #2448

Refs: #2448

Refs: #2471

Register the date a user activation email sent and reset it when the user becomes active (for future use)

This field can have the following values:
* epoch:						signifies the user has been created before adding the specific field (so we have no actually information whether an activation email has been sent or not)  
* NULL:							signifies the user is active or no activation email has been sent
* other date (except epoch):	 the date the activation email sent

Passing the -n option in list users snf command shows only the new users (created after adding the field) who have not received an activation.

Refs: #2471

* new model Service
* new management commands for handling the services
* remove ASTAKOS_CLOUD_SERVICES setting
* change get_services API call to return
the Service objects
* separate admin from service API calls
* introduce send_feedback service API call

Refs: #2413

Provide api calls for permitting helpdesk users to access user information by user email and by username

Refs: #2414

Refs: #2415

if ASTAKOS_COOKIE is set and the request user is not authenticated (sessionid cookie has expired or deleted), authenticate and login the user

Refs: #2291

Refs: #2363

remove is_accepted & date_accepted Invitation fields (substituted by consumed & date_consumed reps.)

snf-manage commands: do not send activation email in active users & do not allow inactive users to send invitations

shibboleth signup form throughs validation error in case of an inactive account with conflicting email

 
keyword argument request is not passed in PasswordResetForm.save(), use BASEURL setting instead of building it from the request

Refs: #2291