Merge pull request #776 from bugzmanov/fb-remoting

[RJA-1631][fix] handling 500 http error code on UI
[RJA-1469] [feature] - self link in list projects, wrapper, JSON
serializer
Merge pull request #773 from rsvato/agents

[RJA-1598] [feature] - self link in list projects
[RJA-1469] [feature] - tests api fixed for changed rest structure
Merge pull request #780 from rsvato/agents

[RJA-1469] [feature] - tests api fixed for changed rest structure
Merge pull request #777 from bugzmanov/fb-remoting

[RJA-xxx][fix] micro optimization
[RJA-1640][fix] adding retry upon 401 http error code in rj  distribution