RR: show collaborators
RR: add collaborator link, closes #496
RR: show actual org name
RR: mock api calls for tests
RR: avoid using "remove"  twice for org-name
RR: show collaborators and members by category
RR: fix tests
PLD: remove org user from members lists
Merge pull request #512 from onaio/496-show-org-collaborators

496 show org collaborators