feat(atlassian_mu): allow changing domain via facility attribute
Created by: Johaney-s
- domain is used in email addresses which uniquely identifies user in atlassian
- now facilityadmins will be able to change the domain
- result mail consists of user_facility login + '@' + facility domain
- fixed missing slashes '/' in api calls
- added total members and users check due to atlassian limits
- group memberships are sent in chunks due to atlassian limits